Enable --arch option in run-test.sh (#24300)
Enable --arch option in run-test.sh (#24300)

There is a help message for --arch option,
but there is no code for the option.

Signed-off-by: Hyung-Kyu Choi <b24f6a1d8ab6a697998e8a2c60eb031a02db5070@samsung.com>
Jiayili1/corefx,Ermiar/corefx,Ermiar/corefx,ericstj/corefx,zhenlan/corefx,ravimeda/corefx,axelheer/corefx,mmitche/corefx,tijoytom/corefx,mmitche/corefx,axelheer/corefx,Ermiar/corefx,Jiayili1/corefx,mmitche/corefx,mmitche/corefx,ptoonen/corefx,Ermiar/corefx,ericstj/corefx,ViktorHofer/corefx,Jiayili1/corefx,parjong/corefx,seanshpark/corefx,zhenlan/corefx,ViktorHofer/corefx,ptoonen/corefx,shimingsg/corefx,Jiayili1/corefx,ViktorHofer/corefx,ViktorHofer/corefx,parjong/corefx,seanshpark/corefx,shimingsg/corefx,tijoytom/corefx,twsouthwick/corefx,twsouthwick/corefx,ptoonen/corefx,Jiayili1/corefx,ericstj/corefx,seanshpark/corefx,fgreinacher/corefx,wtgodbe/corefx,Ermiar/corefx,ericstj/corefx,fgreinacher/corefx,parjong/corefx,wtgodbe/corefx,tijoytom/corefx,shimingsg/corefx,tijoytom/corefx,ericstj/corefx,zhenlan/corefx,fgreinacher/corefx,zhenlan/corefx,shimingsg/corefx,parjong/corefx,ericstj/corefx,ravimeda/corefx,tijoytom/corefx,shimingsg/corefx,shimingsg/corefx,mmitche/corefx,ptoonen/corefx,ptoonen/corefx,shimingsg/corefx,twsouthwick/corefx,tijoytom/corefx,seanshpark/corefx,ravimeda/corefx,ptoonen/corefx,ViktorHofer/corefx,Ermiar/corefx,ravimeda/corefx,wtgodbe/corefx,tijoytom/corefx,BrennanConroy/corefx,ericstj/corefx,seanshpark/corefx,wtgodbe/corefx,axelheer/corefx,ravimeda/corefx,seanshpark/corefx,Jiayili1/corefx,axelheer/corefx,parjong/corefx,axelheer/corefx,parjong/corefx,zhenlan/corefx,ravimeda/corefx,twsouthwick/corefx,Ermiar/corefx,mmitche/corefx,twsouthwick/corefx,twsouthwick/corefx,parjong/corefx,wtgodbe/corefx,ViktorHofer/corefx,wtgodbe/corefx,BrennanConroy/corefx,axelheer/corefx,mmitche/corefx,wtgodbe/corefx,ravimeda/corefx,Jiayili1/corefx,zhenlan/corefx,fgreinacher/corefx,ptoonen/corefx,zhenlan/corefx,seanshpark/corefx,twsouthwick/corefx,ViktorHofer/corefx,BrennanConroy/corefx