Fix some issues in allocator_delete
Fix some issues in allocator_delete

Summary:
The unique_ptr implementation was getting confused about how
to determine the pointer type, so just tell it.

Facebook: Broke the fxl build; test plan included recompiling it.

Test Plan: Built.

Reviewed By: marcelo.juchem@fb.com

FB internal diff: D834371

kernelim/folly,constantine001/folly,hongliangzhao/folly,SeanRBurton/folly,project-zerus/folly,arg0/folly,bikong2/folly,loverszhaokai/folly,tempbottle/folly,stonegithubs/folly,cppfool/folly,lifei/folly,clearlinux/folly,juniway/folly,gaoyingie/folly,mqeizi/folly,facebook/folly,guker/folly,clearlinux/folly,clearlylin/folly,constantine001/folly,clearlinux/folly,ykarlsbrun/folly,PPC64/folly,fw1121/folly,tempbottle/folly,charsyam/folly,fw1121/folly,reddit/folly,romange/folly,facebook/folly,reddit/folly,romange/folly,tomhughes/folly,Orvid/folly,ykarlsbrun/folly,gavioto/folly,tomhughes/folly,doctaweeks/folly,floxard/folly,brunomorishita/folly,theiver9827/folly,ykarlsbrun/folly,bikong2/folly,CJstar/folly,floxard/folly,lifei/folly,leolujuyi/folly,nickhen/folly,nickhen/folly,upsoft/folly,renyinew/folly,raphaelamorim/folly,Orvid/folly,sonnyhu/folly,cole14/folly,guker/folly,fw1121/folly,yangjin-unique/folly,gaoyingie/folly,cole14/folly,Hincoin/folly,juniway/folly,constantine001/folly,stonegithubs/folly,bsampath/folly,stonegithubs/folly,loversInJapan/folly,nickhen/folly,reddit/folly,colemancda/folly,loversInJapan/folly,chjp2046/folly,wildinto/folly,xzmagic/folly,charsyam/folly,zhiweicai/folly,leolujuyi/folly,bowlofstew/folly,arg0/folly,kernelim/folly,hongliangzhao/folly,colemancda/folly,clearlylin/folly,Orvid/folly,facebook/folly,raphaelamorim/folly,romange/folly,fw1121/folly,facebook/folly,bsampath/folly,zhiweicai/folly,alexst07/folly,hongliangzhao/folly,bobegir/folly,project-zerus/folly,KSreeHarsha/folly,bikong2/folly,shaobz/folly,PPC64/folly,rklabs/folly,loversInJapan/folly,upsoft/folly,rklabs/folly,shaobz/folly,PoisonBOx/folly,zhiweicai/folly,mqeizi/folly,PoisonBOx/folly,PoisonBOx/folly,raphaelamorim/folly,rklabs/folly,loverszhaokai/folly,alexst07/folly,rklabs/folly,PPC64/folly,sakishum/folly,raphaelamorim/folly,PoisonBOx/folly,theiver9827/folly,yangjin-unique/folly,guker/folly,romange/folly,lifei/folly,guker/folly,SammyK/folly,doctaweeks/folly,loverszhaokai/folly,lifei/folly,floxard/folly,SammyK/folly,Eagle-X/folly,KSreeHarsha/folly,Hincoin/folly,bobegir/folly,unmeshvrije/C--,floxard/folly,hongliangzhao/folly,leolujuyi/folly,SeanRBurton/folly,romange/folly,Eagle-X/folly,sakishum/folly,sakishum/folly,arg0/folly,tempbottle/folly,PPC64/folly,project-zerus/folly,chjp2046/folly,upsoft/folly,alexst07/folly,CJstar/folly,clearlylin/folly,upsoft/folly,brunomorishita/folly,constantine001/folly,bowlofstew/folly,brunomorishita/folly,bikong2/folly,Orvid/folly,CJstar/folly,Eagle-X/folly,Eagle-X/folly,gavioto/folly,charsyam/folly,bowlofstew/folly,theiver9827/folly,juniway/folly,zhiweicai/folly,bobegir/folly,loversInJapan/folly,mqeizi/folly,Eagle-X/folly,bsampath/folly,chjp2046/folly,gavioto/folly,arg0/folly,kernelim/folly,tempbottle/folly,doctaweeks/folly,unmeshvrije/C--,leolujuyi/folly,clearlinux/folly,KSreeHarsha/folly,shaobz/folly,arg0/folly,chjp2046/folly,kernelim/folly,leolujuyi/folly,bsampath/folly,ykarlsbrun/folly,ykarlsbrun/folly,colemancda/folly,tempbottle/folly,tomhughes/folly,renyinew/folly,unmeshvrije/C--,unmeshvrije/C--,alexst07/folly,wildinto/folly,Hincoin/folly,reddit/folly,xzmagic/folly,SeanRBurton/folly,loverszhaokai/folly,doctaweeks/folly,charsyam/folly,loversInJapan/folly,SeanRBurton/folly,renyinew/folly,KSreeHarsha/folly,clearlylin/folly,fw1121/folly,project-zerus/folly,sonnyhu/folly,lifei/folly,mqeizi/folly,gavioto/folly,nickhen/folly,alexst07/folly,doctaweeks/folly,yangjin-unique/folly,bowlofstew/folly,rklabs/folly,colemancda/folly,bsampath/folly,cppfool/folly,PoisonBOx/folly,renyinew/folly,SammyK/folly,xzmagic/folly,clearlinux/folly,cppfool/folly,upsoft/folly,Hincoin/folly,wildinto/folly,gaoyingie/folly,cole14/folly,juniway/folly,guker/folly,xzmagic/folly,KSreeHarsha/folly,sonnyhu/folly,loverszhaokai/folly,unmeshvrije/C--,brunomorishita/folly,theiver9827/folly,shaobz/folly,sonnyhu/folly,bobegir/folly,bobegir/folly,tomhughes/folly,facebook/folly,xzmagic/folly,colemancda/folly,CJstar/folly,zhiweicai/folly,yangjin-unique/folly,gaoyingie/folly,unmeshvrije/C--,Hincoin/folly,brunomorishita/folly,gavioto/folly,cole14/folly,nickhen/folly,cole14/folly,kernelim/folly,stonegithubs/folly,bikong2/folly,PPC64/folly,wildinto/folly,constantine001/folly,reddit/folly,wildinto/folly,shaobz/folly,bowlofstew/folly,tomhughes/folly,cppfool/folly,SeanRBurton/folly,juniway/folly,raphaelamorim/folly,stonegithubs/folly,renyinew/folly,floxard/folly,SammyK/folly,gaoyingie/folly,yangjin-unique/folly,chjp2046/folly,sakishum/folly,CJstar/folly,clearlylin/folly,sakishum/folly,cppfool/folly,mqeizi/folly,hongliangzhao/folly,theiver9827/folly,SammyK/folly,sonnyhu/folly,Orvid/folly,project-zerus/folly