Fix folly::Singleton error message
Fix folly::Singleton error message

Test Plan: fbmake runtests

Reviewed By: chip@fb.com, pavlo@fb.com

Subscribers: folly-diffs@, yfeldblum

FB internal diff: D1825369

Signature: t1:1825369:1423080185:8507643a3f8860bae6a2240e0ae28fbaf2885b12

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