Adding Windows Phone 8.1 toolset target.
Adding Windows Phone 8.1 toolset target.

attilaz/bx,ShuangxueBai/bx,pigpigyyy/bx,septag/termite,bkaradzic/bx,mmicko/bx,mmicko/bx,0-wiz-0/bx,BlueCrystalLabs/bx,septag/termite,septag/bx,septag/termite,septag/termite,OlegOAndreev/bx,coconutxin/bx,fluffyfreak/bx,bkaradzic/bx,attilaz/bx,BlueCrystalLabs/bx,u-engine/bx,dariomanesku/bx,ShuangxueBai/bx,coconutxin/bx,septag/termite,dariomanesku/bx,OlegOAndreev/bx,fluffyfreak/bx,septag/bx,pigpigyyy/bx,MikePopoloski/bx,0-wiz-0/bx,septag/termite,u-engine/bx,MikePopoloski/bx