Fixed missing virtual destructor in allocator.
Fixed missing virtual destructor in allocator.

Change-Id: I458249d95e6d65ac039e84d947d2fdf4fd1c3809
Tested: on Linux.

Reimerei/flatbuffers,kusharami/flatbuffers,RAldrich/flatbuffers,chenkai036/flatbuffers,RAldrich/flatbuffers,ajrulez/flatbuffers,kadirahq/flatbuffers,xiaPier/flatbuffers,kadirahq/flatbuffers,wheelcomplex/flatbuffers,royalharsh/flatbuffers,cogumbreiro/flatbuffers,DreamHill/flatbuffers,kiyoto-suzuki/flatbuffers,cogumbreiro/flatbuffers,bog-dan-ro/flatbuffers,mormegil-cz/flatbuffers,MiCHiLU/flatbuffers,chenkai036/flatbuffers,wuyan6293/flatbuffers,google/flatbuffers,hryang/flatbuffers,chenkai036/flatbuffers,tieusangaka/flatbuffers,madvay/flatbuffers,fuchsia-mirror/third_party-flatbuffers,Reimerei/flatbuffers,fengshao0907/flatbuffers,layzerar/flatbuffers,EricLagergren/flatbuffers,Belxjander/flatbuffers,DreamHill/flatbuffers,bog-dan-ro/flatbuffers,davidnasar/flatbuffers,radent/flatbuffers,SinbadFreedom/FlatBuffer,onecityuni/flatbuffers,splhack/flatbuffers,evolutional/flatbuffers,pjulien/flatbuffers,royalharsh/flatbuffers,mormegil-cz/flatbuffers,Reimerei/flatbuffers,vitalyisaev2/flatbuffers,benssson/flatbuffers,fuchsia-mirror/third_party-flatbuffers,kiyoto-suzuki/flatbuffers,eburkitt/flatbuffers,google/flatbuffers,yaolinz/flatbuffers,google/flatbuffers,hryang/flatbuffers,cogumbreiro/flatbuffers,xiaPier/flatbuffers,1yvT0s/flatbuffers,jasonstubbs/flatbuffers,jackyglony/flatbuffers,wingahi/flatbuffers,JackLian/flatbuffers,hryang/flatbuffers,guker/flatbuffers,pjulien/flatbuffers,i17c/flatbuffers,splhack/flatbuffers,kusharami/flatbuffers,Volcanoscar/flatbuffers,MiCHiLU/flatbuffers,evolutional/flatbuffers,zhuxiaohao/flatbuffers,hgl888/flatbuffers,rw/flatbuffers,fengshao0907/flatbuffers,royalharsh/flatbuffers,hanhailong/flatbuffers,SinbadFreedom/FlatBuffer,zarianw/flatbuffers,evanw/flatbuffers,mormegil-cz/flatbuffers,i17c/flatbuffers,pakoito/flatbuffers,stewartmiles/flatbuffers,ajrulez/flatbuffers,JackLian/flatbuffers,stewartmiles/flatbuffers,eburkitt/flatbuffers,evolutional/flatbuffers,dwillmer/flatbuffers,eburkitt/flatbuffers,eproxus/flatbuffers,Volcanoscar/flatbuffers,xudeheng/flatbuffers,pjulien/flatbuffers,wheelcomplex/flatbuffers,lulufei/flatbuffers,rw/flatbuffers,cogumbreiro/flatbuffers,bog-dan-ro/flatbuffers,KeronTeam/flatbuffers,google/flatbuffers,aeneid/flatbuffers,xiaPier/flatbuffers,fengshao0907/flatbuffers,yaolinz/flatbuffers,iperry/flatbuffers,chenkai036/flatbuffers,EricLagergren/flatbuffers,alarouche/flatbuffers,alexames/flatbuffers,lulufei/flatbuffers,RAldrich/flatbuffers,aeneid/flatbuffers,rw/flatbuffers,vitalyisaev2/flatbuffers,DavadDi/flatbuffers,eburkitt/flatbuffers,splhack/flatbuffers,eburkitt/flatbuffers,dwillmer/flatbuffers,hanhailong/flatbuffers,rw/flatbuffers,hanhailong/flatbuffers,arbitrary-cat/flatbuffers,google/flatbuffers,royalharsh/flatbuffers,RAldrich/flatbuffers,jekinchen/flatjni,zhuxiaohao/flatbuffers,i17c/flatbuffers,wuyan6293/flatbuffers,dwillmer/flatbuffers,royalharsh/flatbuffers,evanw/flatbuffers,robertfsegal/flatbuffers,DreamHill/flatbuffers,guker/flatbuffers,brunoqc/flatbuffers,splhack/flatbuffers,felixguendling/flatbuffers,benssson/flatbuffers,iperry/flatbuffers,FrankStain/flatbuffers,chobie/flatbuffers,RyanTech/flatbuffers,alarouche/flatbuffers,FrankStain/flatbuffers,guker/flatbuffers,alexames/flatbuffers,kadirahq/flatbuffers,fengshao0907/flatbuffers,i17c/flatbuffers,brunoqc/flatbuffers,royalharsh/flatbuffers,layzerar/flatbuffers,yiliaofan/flatbuffers,DreamHill/flatbuffers,alexames/flatbuffers,RyanTech/flatbuffers,xudeheng/flatbuffers,zarianw/flatbuffers,wuyan6293/flatbuffers,KeronTeam/flatbuffers,Belxjander/flatbuffers,kiyoto-suzuki/flatbuffers,KeronTeam/flatbuffers,jbrads/flatbuffers,google/flatbuffers,evolutional/flatbuffers,bog-dan-ro/flatbuffers,kiyoto-suzuki/flatbuffers,mormegil-cz/flatbuffers,JackLian/flatbuffers,SinbadFreedom/FlatBuffer,SinbadFreedom/FlatBuffer,RyanTech/flatbuffers,cogumbreiro/flatbuffers,google/flatbuffers,SinbadFreedom/FlatBuffer,onecityuni/flatbuffers,layzerar/flatbuffers,zarianw/flatbuffers,FrankStain/flatbuffers,jasonstubbs/flatbuffers,google/flatbuffers,KeronTeam/flatbuffers,MiCHiLU/flatbuffers,wingahi/flatbuffers,evolutional/flatbuffers,zhuxiaohao/flatbuffers,rw/flatbuffers,splhack/flatbuffers,benssson/flatbuffers,ThomasBrixLarsen/flatbuffers,kadirahq/flatbuffers,pjulien/flatbuffers,i17c/flatbuffers,hryang/flatbuffers,hryang/flatbuffers,splhack/flatbuffers,pjulien/flatbuffers,benssson/flatbuffers,davidnasar/flatbuffers,hgl888/flatbuffers,marschall/flatbuffers,Volcanoscar/flatbuffers,chenkai036/flatbuffers,bog-dan-ro/flatbuffers,jekinchen/flatjni,Reimerei/flatbuffers,evolutional/flatbuffers,fuchsia-mirror/third_party-flatbuffers,jasonstubbs/flatbuffers,alexames/flatbuffers,wingahi/flatbuffers,rw/flatbuffers,alexames/flatbuffers,Volcanoscar/flatbuffers,google/flatbuffers,Volcanoscar/flatbuffers,radent/flatbuffers,evolutional/flatbuffers,endorph-soft/flatbuffers,vanloswang/flatbuffers,ThomasBrixLarsen/flatbuffers,madvay/flatbuffers,ThomasBrixLarsen/flatbuffers,uus169/flatbuffers,robertfsegal/flatbuffers,DavadDi/flatbuffers,google/flatbuffers,SinbadFreedom/FlatBuffer,jasonstubbs/flatbuffers,chobie/flatbuffers,royalharsh/flatbuffers,ajrulez/flatbuffers,endorph-soft/flatbuffers,endorph-soft/flatbuffers,xiaPier/flatbuffers,pjulien/flatbuffers,alexames/flatbuffers,i17c/flatbuffers,Belxjander/flatbuffers,uus169/flatbuffers,RAldrich/flatbuffers,rw/flatbuffers,mormegil-cz/flatbuffers,google/flatbuffers,hanhailong/flatbuffers,zarianw/flatbuffers,royalharsh/flatbuffers,vitalyisaev2/flatbuffers,madvay/flatbuffers,wheelcomplex/flatbuffers,FrankStain/flatbuffers,alexames/flatbuffers,vitalyisaev2/flatbuffers,kiyoto-suzuki/flatbuffers,benssson/flatbuffers,fuchsia-mirror/third_party-flatbuffers,Reimerei/flatbuffers,jekinchen/flatjni,evolutional/flatbuffers,alexames/flatbuffers,pjulien/flatbuffers,jekinchen/flatjni,EricLagergren/flatbuffers,1yvT0s/flatbuffers,fuchsia-mirror/third_party-flatbuffers,evanw/flatbuffers,ajrulez/flatbuffers,xudeheng/flatbuffers,DreamHill/flatbuffers,marschall/flatbuffers,iperry/flatbuffers,evanw/flatbuffers,robertfsegal/flatbuffers,felixguendling/flatbuffers,benssson/flatbuffers,stewartmiles/flatbuffers,robertfsegal/flatbuffers,yiliaofan/flatbuffers,evolutional/flatbuffers,marschall/flatbuffers,fuchsia-mirror/third_party-flatbuffers,madvay/flatbuffers,jasonstubbs/flatbuffers,kusharami/flatbuffers,wingahi/flatbuffers,dwillmer/flatbuffers,wuyan6293/flatbuffers,yaolinz/flatbuffers,DavadDi/flatbuffers,wheelcomplex/flatbuffers,wheelcomplex/flatbuffers,yiliaofan/flatbuffers,zarianw/flatbuffers,pjulien/flatbuffers,RyanTech/flatbuffers,yaolinz/flatbuffers,xudeheng/flatbuffers,jbrads/flatbuffers,eproxus/flatbuffers,aeneid/flatbuffers,alexames/flatbuffers,alexames/flatbuffers,felixguendling/flatbuffers,SinbadFreedom/FlatBuffer,MiCHiLU/flatbuffers,ThomasBrixLarsen/flatbuffers,alarouche/flatbuffers,FrankStain/flatbuffers,stewartmiles/flatbuffers,dwillmer/flatbuffers,wingahi/flatbuffers,vitalyisaev2/flatbuffers,wheelcomplex/flatbuffers,evanw/flatbuffers,evanw/flatbuffers,zarianw/flatbuffers,robertfsegal/flatbuffers,fuchsia-mirror/third_party-flatbuffers,SinbadFreedom/FlatBuffer,google/flatbuffers,tieusangaka/flatbuffers,ThomasBrixLarsen/flatbuffers,pakoito/flatbuffers,pakoito/flatbuffers,endorph-soft/flatbuffers,yiliaofan/flatbuffers,arbitrary-cat/flatbuffers,jekinchen/flatjni,chenkai036/flatbuffers,pakoito/flatbuffers,aeneid/flatbuffers,yiliaofan/flatbuffers,FrankStain/flatbuffers,wheelcomplex/flatbuffers,vitalyisaev2/flatbuffers,RAldrich/flatbuffers,splhack/flatbuffers,yiliaofan/flatbuffers,ajrulez/flatbuffers,hanhailong/flatbuffers,pakoito/flatbuffers,vanloswang/flatbuffers,evanw/flatbuffers,DavadDi/flatbuffers,pjulien/flatbuffers,chenkai036/flatbuffers,jackyglony/flatbuffers,iperry/flatbuffers,alarouche/flatbuffers,endorph-soft/flatbuffers,iperry/flatbuffers,radent/flatbuffers,rw/flatbuffers,alexames/flatbuffers,onecityuni/flatbuffers,iperry/flatbuffers,guker/flatbuffers,vanloswang/flatbuffers,DavadDi/flatbuffers,aeneid/flatbuffers,1yvT0s/flatbuffers,uus169/flatbuffers,alexames/flatbuffers,hgl888/flatbuffers,1yvT0s/flatbuffers,yaolinz/flatbuffers,arbitrary-cat/flatbuffers,eburkitt/flatbuffers,xiaPier/flatbuffers,marschall/flatbuffers,jekinchen/flatjni,pjulien/flatbuffers,Reimerei/flatbuffers,wuyan6293/flatbuffers,FrankStain/flatbuffers,benssson/flatbuffers,google/flatbuffers,hgl888/flatbuffers,MiCHiLU/flatbuffers,rw/flatbuffers,jackyglony/flatbuffers,kadirahq/flatbuffers,lulufei/flatbuffers,chobie/flatbuffers,FrankStain/flatbuffers,kiyoto-suzuki/flatbuffers,stewartmiles/flatbuffers,zarianw/flatbuffers,felixguendling/flatbuffers,davidnasar/flatbuffers,RyanTech/flatbuffers,stewartmiles/flatbuffers,EricLagergren/flatbuffers,stewartmiles/flatbuffers,xudeheng/flatbuffers,jbrads/flatbuffers,onecityuni/flatbuffers,JackLian/flatbuffers,stewartmiles/flatbuffers,MiCHiLU/flatbuffers,endorph-soft/flatbuffers,radent/flatbuffers,arbitrary-cat/flatbuffers,guker/flatbuffers,alarouche/flatbuffers,google/flatbuffers,hgl888/flatbuffers,jasonstubbs/flatbuffers,rw/flatbuffers,aeneid/flatbuffers,evanw/flatbuffers,google/flatbuffers,yaolinz/flatbuffers,Reimerei/flatbuffers,marschall/flatbuffers,uus169/flatbuffers,tieusangaka/flatbuffers,mormegil-cz/flatbuffers,brunoqc/flatbuffers,vanloswang/flatbuffers,zarianw/flatbuffers,royalharsh/flatbuffers,kadirahq/flatbuffers,radent/flatbuffers,1yvT0s/flatbuffers,iperry/flatbuffers,stewartmiles/flatbuffers,uus169/flatbuffers,chenkai036/flatbuffers,chobie/flatbuffers,jackyglony/flatbuffers,xiaPier/flatbuffers,stewartmiles/flatbuffers,stewartmiles/flatbuffers,DreamHill/flatbuffers,pjulien/flatbuffers,jasonstubbs/flatbuffers,xudeheng/flatbuffers,jekinchen/flatjni,cogumbreiro/flatbuffers,royalharsh/flatbuffers,EricLagergren/flatbuffers,alexames/flatbuffers,zhuxiaohao/flatbuffers,madvay/flatbuffers,vanloswang/flatbuffers,davidnasar/flatbuffers,chobie/flatbuffers,EricLagergren/flatbuffers,evolutional/flatbuffers,tieusangaka/flatbuffers,evolutional/flatbuffers,pjulien/flatbuffers,vanloswang/flatbuffers,felixguendling/flatbuffers,kusharami/flatbuffers,evolutional/flatbuffers,benssson/flatbuffers,eburkitt/flatbuffers,jbrads/flatbuffers,tieusangaka/flatbuffers,hryang/flatbuffers,alexames/flatbuffers,hgl888/flatbuffers,lulufei/flatbuffers,eburkitt/flatbuffers,dwillmer/flatbuffers,tieusangaka/flatbuffers,jbrads/flatbuffers,arbitrary-cat/flatbuffers,lulufei/flatbuffers,ajrulez/flatbuffers,layzerar/flatbuffers,jbrads/flatbuffers,stewartmiles/flatbuffers,eproxus/flatbuffers,rw/flatbuffers,robertfsegal/flatbuffers,bog-dan-ro/flatbuffers,brunoqc/flatbuffers,chobie/flatbuffers,Volcanoscar/flatbuffers,alexames/flatbuffers,layzerar/flatbuffers,chenkai036/flatbuffers,jbrads/flatbuffers,endorph-soft/flatbuffers,guker/flatbuffers,davidnasar/flatbuffers,JackLian/flatbuffers,MiCHiLU/flatbuffers,vitalyisaev2/flatbuffers,DavadDi/flatbuffers,zhuxiaohao/flatbuffers,chobie/flatbuffers,jackyglony/flatbuffers,bog-dan-ro/flatbuffers,endorph-soft/flatbuffers,MiCHiLU/flatbuffers,zhuxiaohao/flatbuffers,1yvT0s/flatbuffers,jekinchen/flatjni,layzerar/flatbuffers,lulufei/flatbuffers,brunoqc/flatbuffers,fengshao0907/flatbuffers,wuyan6293/flatbuffers,marschall/flatbuffers,Belxjander/flatbuffers,evolutional/flatbuffers,EricLagergren/flatbuffers,ThomasBrixLarsen/flatbuffers,kadirahq/flatbuffers,onecityuni/flatbuffers,davidnasar/flatbuffers,JackLian/flatbuffers,chobie/flatbuffers,felixguendling/flatbuffers,kiyoto-suzuki/flatbuffers,jekinchen/flatjni,wheelcomplex/flatbuffers,brunoqc/flatbuffers,pakoito/flatbuffers,kadirahq/flatbuffers,stewartmiles/flatbuffers,wingahi/flatbuffers,layzerar/flatbuffers,fengshao0907/flatbuffers,iperry/flatbuffers,jekinchen/flatjni,vitalyisaev2/flatbuffers,endorph-soft/flatbuffers,eproxus/flatbuffers,kusharami/flatbuffers,splhack/flatbuffers,jasonstubbs/flatbuffers,fuchsia-mirror/third_party-flatbuffers,bog-dan-ro/flatbuffers,jbrads/flatbuffers,eproxus/flatbuffers,kiyoto-suzuki/flatbuffers,endorph-soft/flatbuffers,RyanTech/flatbuffers,Belxjander/flatbuffers,hanhailong/flatbuffers,uus169/flatbuffers,KeronTeam/flatbuffers,jackyglony/flatbuffers,kiyoto-suzuki/flatbuffers,EricLagergren/flatbuffers,eproxus/flatbuffers,alarouche/flatbuffers,Belxjander/flatbuffers,KeronTeam/flatbuffers,rw/flatbuffers,chenkai036/flatbuffers