Add 'skiptests' option to corefx/build.sh
Add 'skiptests' option to corefx/build.sh

We have to wait for a long time even though we don't need to make test files
(e.g. *Tests.dll and *Tests.pdb). This patch is to add 'skiptests' option to
the existing build.sh of corefx.

Sample usage:
u14.04$> time  ./build.sh managed debug   clean verbose  skiptests
u14.04$> time  ./build.sh managed release clean verbose  skiptests

Signed-off-by: 3114592799174a94582c8660ec54dcf6a2166026@samsung.com
Signed-off-by: b4cb431ace74c0c632e7da94c8e49db850b1fab1@samsung.com
Signed-off-by: 1c00c485ef5834f59bb5a88e57bc2c4516891523@samsung.com

marksmeltzer/corefx,rahku/corefx,shahid-pk/corefx,SGuyGe/corefx,marksmeltzer/corefx,billwert/corefx,dotnet-bot/corefx,stephenmichaelf/corefx,krk/corefx,MaggieTsang/corefx,ellismg/corefx,JosephTremoulet/corefx,pallavit/corefx,shimingsg/corefx,jcme/corefx,ptoonen/corefx,nchikanov/corefx,stone-li/corefx,yizhang82/corefx,zhenlan/corefx,dsplaisted/corefx,wtgodbe/corefx,cartermp/corefx,shahid-pk/corefx,iamjasonp/corefx,Chrisboh/corefx,shmao/corefx,kkurni/corefx,krk/corefx,kkurni/corefx,stephenmichaelf/corefx,weltkante/corefx,rubo/corefx,krytarowski/corefx,shmao/corefx,iamjasonp/corefx,MaggieTsang/corefx,BrennanConroy/corefx,ravimeda/corefx,parjong/corefx,tijoytom/corefx,Priya91/corefx-1,shimingsg/corefx,jcme/corefx,cydhaselton/corefx,pallavit/corefx,rahku/corefx,ravimeda/corefx,the-dwyer/corefx,ellismg/corefx,fgreinacher/corefx,nbarbettini/corefx,alexperovich/corefx,cydhaselton/corefx,Ermiar/corefx,MaggieTsang/corefx,mmitche/corefx,Chrisboh/corefx,zhenlan/corefx,richlander/corefx,stone-li/corefx,yizhang82/corefx,marksmeltzer/corefx,yizhang82/corefx,twsouthwick/corefx,Petermarcu/corefx,dotnet-bot/corefx,twsouthwick/corefx,the-dwyer/corefx,rjxby/corefx,rjxby/corefx,tijoytom/corefx,SGuyGe/corefx,lggomez/corefx,krytarowski/corefx,richlander/corefx,stone-li/corefx,seanshpark/corefx,MaggieTsang/corefx,rjxby/corefx,the-dwyer/corefx,gkhanna79/corefx,ravimeda/corefx,adamralph/corefx,parjong/corefx,ptoonen/corefx,shmao/corefx,jhendrixMSFT/corefx,stephenmichaelf/corefx,the-dwyer/corefx,twsouthwick/corefx,axelheer/corefx,krk/corefx,Chrisboh/corefx,wtgodbe/corefx,axelheer/corefx,DnlHarvey/corefx,tstringer/corefx,rubo/corefx,mazong1123/corefx,Petermarcu/corefx,ViktorHofer/corefx,Priya91/corefx-1,jhendrixMSFT/corefx,lggomez/corefx,seanshpark/corefx,YoupHulsebos/corefx,nbarbettini/corefx,Chrisboh/corefx,elijah6/corefx,SGuyGe/corefx,jcme/corefx,Priya91/corefx-1,shahid-pk/corefx,twsouthwick/corefx,Ermiar/corefx,shahid-pk/corefx,dhoehna/corefx,tstringer/corefx,kkurni/corefx,ViktorHofer/corefx,alphonsekurian/corefx,billwert/corefx,elijah6/corefx,adamralph/corefx,richlander/corefx,SGuyGe/corefx,dhoehna/corefx,kkurni/corefx,dotnet-bot/corefx,krk/corefx,cydhaselton/corefx,rubo/corefx,MaggieTsang/corefx,shmao/corefx,DnlHarvey/corefx,tstringer/corefx,ellismg/corefx,ellismg/corefx,krk/corefx,ericstj/corefx,dhoehna/corefx,krytarowski/corefx,iamjasonp/corefx,rjxby/corefx,axelheer/corefx,iamjasonp/corefx,shahid-pk/corefx,Jiayili1/corefx,kkurni/corefx,tstringer/corefx,nbarbettini/corefx,cartermp/corefx,ellismg/corefx,Petermarcu/corefx,alexperovich/corefx,yizhang82/corefx,jlin177/corefx,lggomez/corefx,ptoonen/corefx,shimingsg/corefx,ravimeda/corefx,alphonsekurian/corefx,dotnet-bot/corefx,parjong/corefx,YoupHulsebos/corefx,ViktorHofer/corefx,dhoehna/corefx,DnlHarvey/corefx,JosephTremoulet/corefx,dotnet-bot/corefx,stone-li/corefx,fgreinacher/corefx,marksmeltzer/corefx,manu-silicon/corefx,shimingsg/corefx,DnlHarvey/corefx,yizhang82/corefx,ellismg/corefx,shmao/corefx,jhendrixMSFT/corefx,ViktorHofer/corefx,cartermp/corefx,twsouthwick/corefx,seanshpark/corefx,Jiayili1/corefx,mmitche/corefx,mazong1123/corefx,axelheer/corefx,elijah6/corefx,JosephTremoulet/corefx,rubo/corefx,rahku/corefx,ericstj/corefx,twsouthwick/corefx,krytarowski/corefx,gkhanna79/corefx,billwert/corefx,pallavit/corefx,manu-silicon/corefx,JosephTremoulet/corefx,tijoytom/corefx,YoupHulsebos/corefx,yizhang82/corefx,shimingsg/corefx,Ermiar/corefx,marksmeltzer/corefx,parjong/corefx,manu-silicon/corefx,stephenmichaelf/corefx,mazong1123/corefx,jcme/corefx,Ermiar/corefx,YoupHulsebos/corefx,yizhang82/corefx,weltkante/corefx,the-dwyer/corefx,SGuyGe/corefx,mmitche/corefx,ericstj/corefx,dhoehna/corefx,nbarbettini/corefx,Chrisboh/corefx,DnlHarvey/corefx,jlin177/corefx,dhoehna/corefx,ViktorHofer/corefx,manu-silicon/corefx,wtgodbe/corefx,marksmeltzer/corefx,Ermiar/corefx,ptoonen/corefx,cydhaselton/corefx,richlander/corefx,nbarbettini/corefx,alexperovich/corefx,alphonsekurian/corefx,shmao/corefx,JosephTremoulet/corefx,wtgodbe/corefx,khdang/corefx,Ermiar/corefx,nbarbettini/corefx,alexperovich/corefx,stephenmichaelf/corefx,rubo/corefx,wtgodbe/corefx,weltkante/corefx,stone-li/corefx,ericstj/corefx,stone-li/corefx,BrennanConroy/corefx,tijoytom/corefx,nchikanov/corefx,Petermarcu/corefx,ravimeda/corefx,ViktorHofer/corefx,krytarowski/corefx,Priya91/corefx-1,gkhanna79/corefx,mazong1123/corefx,elijah6/corefx,lggomez/corefx,gkhanna79/corefx,BrennanConroy/corefx,YoupHulsebos/corefx,weltkante/corefx,cartermp/corefx,krytarowski/corefx,tijoytom/corefx,Jiayili1/corefx,weltkante/corefx,ptoonen/corefx,ravimeda/corefx,mazong1123/corefx,lggomez/corefx,pallavit/corefx,krk/corefx,mazong1123/corefx,rahku/corefx,manu-silicon/corefx,tijoytom/corefx,JosephTremoulet/corefx,nchikanov/corefx,alexperovich/corefx,rahku/corefx,parjong/corefx,rahku/corefx,khdang/corefx,DnlHarvey/corefx,parjong/corefx,wtgodbe/corefx,DnlHarvey/corefx,cartermp/corefx,iamjasonp/corefx,elijah6/corefx,jcme/corefx,manu-silicon/corefx,iamjasonp/corefx,ericstj/corefx,cydhaselton/corefx,alphonsekurian/corefx,jlin177/corefx,dotnet-bot/corefx,khdang/corefx,lggomez/corefx,nchikanov/corefx,billwert/corefx,Ermiar/corefx,stephenmichaelf/corefx,weltkante/corefx,MaggieTsang/corefx,kkurni/corefx,dsplaisted/corefx,wtgodbe/corefx,tstringer/corefx,jlin177/corefx,rjxby/corefx,gkhanna79/corefx,khdang/corefx,jhendrixMSFT/corefx,axelheer/corefx,jcme/corefx,rjxby/corefx,ericstj/corefx,jlin177/corefx,nchikanov/corefx,ViktorHofer/corefx,weltkante/corefx,richlander/corefx,Petermarcu/corefx,ericstj/corefx,elijah6/corefx,dotnet-bot/corefx,Jiayili1/corefx,mmitche/corefx,axelheer/corefx,khdang/corefx,alexperovich/corefx,alphonsekurian/corefx,zhenlan/corefx,mazong1123/corefx,krytarowski/corefx,seanshpark/corefx,marksmeltzer/corefx,the-dwyer/corefx,tijoytom/corefx,zhenlan/corefx,fgreinacher/corefx,pallavit/corefx,the-dwyer/corefx,zhenlan/corefx,seanshpark/corefx,parjong/corefx,Priya91/corefx-1,nchikanov/corefx,Petermarcu/corefx,Petermarcu/corefx,Priya91/corefx-1,shmao/corefx,stone-li/corefx,cydhaselton/corefx,stephenmichaelf/corefx,mmitche/corefx,khdang/corefx,shahid-pk/corefx,nbarbettini/corefx,twsouthwick/corefx,jlin177/corefx,alphonsekurian/corefx,nchikanov/corefx,fgreinacher/corefx,Jiayili1/corefx,gkhanna79/corefx,seanshpark/corefx,jhendrixMSFT/corefx,rahku/corefx,jlin177/corefx,billwert/corefx,billwert/corefx,richlander/corefx,jhendrixMSFT/corefx,MaggieTsang/corefx,krk/corefx,richlander/corefx,shimingsg/corefx,billwert/corefx,dsplaisted/corefx,rjxby/corefx,gkhanna79/corefx,alexperovich/corefx,ptoonen/corefx,seanshpark/corefx,Jiayili1/corefx,zhenlan/corefx,ravimeda/corefx,Chrisboh/corefx,manu-silicon/corefx,dhoehna/corefx,alphonsekurian/corefx,shimingsg/corefx,jhendrixMSFT/corefx,tstringer/corefx,JosephTremoulet/corefx,YoupHulsebos/corefx,SGuyGe/corefx,adamralph/corefx,lggomez/corefx,ptoonen/corefx,YoupHulsebos/corefx,cydhaselton/corefx,Jiayili1/corefx,elijah6/corefx,iamjasonp/corefx,cartermp/corefx,zhenlan/corefx,pallavit/corefx,mmitche/corefx,mmitche/corefx