Add clean to Makefile
Add clean to Makefile

swaroop-sridhar/roslyn,lorcanmooney/roslyn,zooba/roslyn,jmarolf/roslyn,mattwar/roslyn,Shiney/roslyn,physhi/roslyn,bartdesmet/roslyn,khyperia/roslyn,KevinH-MS/roslyn,dotnet/roslyn,KiloBravoLima/roslyn,xasx/roslyn,Hosch250/roslyn,eriawan/roslyn,MichalStrehovsky/roslyn,aelij/roslyn,natgla/roslyn,DustinCampbell/roslyn,AdamSpeight2008/roslyn-AdamSpeight2008,xoofx/roslyn,physhi/roslyn,jhendrixMSFT/roslyn,managed-commons/roslyn,khyperia/roslyn,vslsnap/roslyn,drognanar/roslyn,Giftednewt/roslyn,genlu/roslyn,tvand7093/roslyn,drognanar/roslyn,sharadagrawal/Roslyn,bkoelman/roslyn,mmitche/roslyn,KirillOsenkov/roslyn,TyOverby/roslyn,KevinH-MS/roslyn,reaction1989/roslyn,robinsedlaczek/roslyn,jaredpar/roslyn,bkoelman/roslyn,agocke/roslyn,bbarry/roslyn,budcribar/roslyn,sharwell/roslyn,weltkante/roslyn,a-ctor/roslyn,jeffanders/roslyn,abock/roslyn,genlu/roslyn,KiloBravoLima/roslyn,vcsjones/roslyn,yeaicc/roslyn,zooba/roslyn,michalhosala/roslyn,rgani/roslyn,nguerrera/roslyn,mmitche/roslyn,vcsjones/roslyn,sharadagrawal/Roslyn,xoofx/roslyn,Maxwe11/roslyn,CaptainHayashi/roslyn,AnthonyDGreen/roslyn,KevinRansom/roslyn,davkean/roslyn,drognanar/roslyn,amcasey/roslyn,antonssonj/roslyn,jasonmalinowski/roslyn,HellBrick/roslyn,amcasey/roslyn,tannergooding/roslyn,srivatsn/roslyn,khellang/roslyn,genlu/roslyn,ljw1004/roslyn,swaroop-sridhar/roslyn,rgani/roslyn,wvdd007/roslyn,MatthieuMEZIL/roslyn,tvand7093/roslyn,orthoxerox/roslyn,physhi/roslyn,davkean/roslyn,bkoelman/roslyn,kelltrick/roslyn,MatthieuMEZIL/roslyn,robinsedlaczek/roslyn,cston/roslyn,yeaicc/roslyn,shyamnamboodiripad/roslyn,thomaslevesque/roslyn,mgoertz-msft/roslyn,HellBrick/roslyn,mmitche/roslyn,ErikSchierboom/roslyn,mavasani/roslyn,jasonmalinowski/roslyn,sharadagrawal/Roslyn,wvdd007/roslyn,AArnott/roslyn,gafter/roslyn,tmeschter/roslyn,brettfo/roslyn,nguerrera/roslyn,jeffanders/roslyn,jeffanders/roslyn,AnthonyDGreen/roslyn,Hosch250/roslyn,dotnet/roslyn,KevinH-MS/roslyn,mgoertz-msft/roslyn,ericfe-ms/roslyn,antonssonj/roslyn,AmadeusW/roslyn,MichalStrehovsky/roslyn,paulvanbrenk/roslyn,bartdesmet/roslyn,KirillOsenkov/roslyn,stephentoub/roslyn,swaroop-sridhar/roslyn,abock/roslyn,agocke/roslyn,paulvanbrenk/roslyn,pdelvo/roslyn,jkotas/roslyn,xoofx/roslyn,balajikris/roslyn,panopticoncentral/roslyn,tannergooding/roslyn,jcouv/roslyn,leppie/roslyn,CaptainHayashi/roslyn,AlekseyTs/roslyn,weltkante/roslyn,bartdesmet/roslyn,CyrusNajmabadi/roslyn,orthoxerox/roslyn,HellBrick/roslyn,akrisiun/roslyn,tvand7093/roslyn,eriawan/roslyn,khyperia/roslyn,jamesqo/roslyn,KiloBravoLima/roslyn,ljw1004/roslyn,yeaicc/roslyn,jhendrixMSFT/roslyn,a-ctor/roslyn,tannergooding/roslyn,lorcanmooney/roslyn,stephentoub/roslyn,jaredpar/roslyn,MichalStrehovsky/roslyn,amcasey/roslyn,OmarTawfik/roslyn,diryboy/roslyn,jcouv/roslyn,akrisiun/roslyn,jkotas/roslyn,srivatsn/roslyn,OmarTawfik/roslyn,DustinCampbell/roslyn,tmat/roslyn,Giftednewt/roslyn,natgla/roslyn,VSadov/roslyn,MattWindsor91/roslyn,SeriaWei/roslyn,stephentoub/roslyn,jasonmalinowski/roslyn,diryboy/roslyn,robinsedlaczek/roslyn,basoundr/roslyn,thomaslevesque/roslyn,balajikris/roslyn,DustinCampbell/roslyn,ericfe-ms/roslyn,AmadeusW/roslyn,bbarry/roslyn,ljw1004/roslyn,mattscheffer/roslyn,ValentinRueda/roslyn,mattwar/roslyn,jhendrixMSFT/roslyn,kelltrick/roslyn,weltkante/roslyn,tmat/roslyn,TyOverby/roslyn,shyamnamboodiripad/roslyn,tmeschter/roslyn,CyrusNajmabadi/roslyn,balajikris/roslyn,VSadov/roslyn,mattscheffer/roslyn,lorcanmooney/roslyn,bbarry/roslyn,jmarolf/roslyn,AArnott/roslyn,shyamnamboodiripad/roslyn,rgani/roslyn,AdamSpeight2008/roslyn-AdamSpeight2008,jkotas/roslyn,thomaslevesque/roslyn,Giftednewt/roslyn,AmadeusW/roslyn,abock/roslyn,heejaechang/roslyn,basoundr/roslyn,mattscheffer/roslyn,Pvlerick/roslyn,managed-commons/roslyn,dotnet/roslyn,wvdd007/roslyn,KevinRansom/roslyn,vslsnap/roslyn,vslsnap/roslyn,khellang/roslyn,akrisiun/roslyn,ErikSchierboom/roslyn,mattwar/roslyn,Maxwe11/roslyn,brettfo/roslyn,TyOverby/roslyn,AnthonyDGreen/roslyn,dpoeschl/roslyn,mgoertz-msft/roslyn,tmat/roslyn,jamesqo/roslyn,Maxwe11/roslyn,sharwell/roslyn,natgla/roslyn,heejaechang/roslyn,nguerrera/roslyn,SeriaWei/roslyn,KirillOsenkov/roslyn,SeriaWei/roslyn,cston/roslyn,pdelvo/roslyn,orthoxerox/roslyn,xasx/roslyn,AlekseyTs/roslyn,budcribar/roslyn,tmeschter/roslyn,VSadov/roslyn,ericfe-ms/roslyn,Pvlerick/roslyn,brettfo/roslyn,leppie/roslyn,agocke/roslyn,gafter/roslyn,heejaechang/roslyn,panopticoncentral/roslyn,ValentinRueda/roslyn,managed-commons/roslyn,antonssonj/roslyn,diryboy/roslyn,natidea/roslyn,aelij/roslyn,jamesqo/roslyn,Hosch250/roslyn,MattWindsor91/roslyn,AdamSpeight2008/roslyn-AdamSpeight2008,CyrusNajmabadi/roslyn,michalhosala/roslyn,pdelvo/roslyn,AArnott/roslyn,ValentinRueda/roslyn,aelij/roslyn,budcribar/roslyn,jmarolf/roslyn,a-ctor/roslyn,Pvlerick/roslyn,basoundr/roslyn,MattWindsor91/roslyn,CaptainHayashi/roslyn,xasx/roslyn,OmarTawfik/roslyn,panopticoncentral/roslyn,eriawan/roslyn,jcouv/roslyn,reaction1989/roslyn,zooba/roslyn,mavasani/roslyn,MatthieuMEZIL/roslyn,mavasani/roslyn,AlekseyTs/roslyn,sharwell/roslyn,khellang/roslyn,reaction1989/roslyn,srivatsn/roslyn,KevinRansom/roslyn,MattWindsor91/roslyn,gafter/roslyn,paulvanbrenk/roslyn,vcsjones/roslyn,natidea/roslyn,natidea/roslyn,jaredpar/roslyn,dpoeschl/roslyn,ErikSchierboom/roslyn,Shiney/roslyn,cston/roslyn,dpoeschl/roslyn,leppie/roslyn,kelltrick/roslyn,Shiney/roslyn,michalhosala/roslyn,davkean/roslyn