fix? AutoTimerTest
fix? AutoTimerTest

Summary: Apparently this test sometimes fails. @Gownta suggests it's because we're
storing temproaries in StringPiece. Change it to store in a std::string, which
should hopefully fix it.

Reviewed By: @Gownta

Differential Revision: D2208643

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