Add ALLOCM_LG_ALIGN to Malloc.h
Add ALLOCM_LG_ALIGN to Malloc.h

Test Plan: .

Reviewed By: soren@fb.com

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