Add build-test target to compile with all the available Xcode versions in the system.
Add build-test target to compile with all the available Xcode versions in the system.

brucehappy/XVim,hyperspacemark/XVim,tanxxjun321/XVim,N4tr0n/XVim,dengcqw/XVim_x,ishkawa/XVim,hyperspacemark/XVim,hyperspacemark/XVim,N4tr0n/XVim,pebble8888/XVim,antmd/XVim,pebble8888/XVim,antmd/XVim,antmd/XVim,ishkawa/XVim,tanxxjun321/XVim,brucehappy/XVim,pebble8888/XVim,tanxxjun321/XVim,XVimProject/XVim,hyperspacemark/XVim,antmd/XVim,N4tr0n/XVim,brucehappy/XVim,ishkawa/XVim,dengcqw/XVim_x,XVimProject/XVim,XVimProject/XVim,dengcqw/XVim_x,tanxxjun321/XVim,N4tr0n/XVim,ishkawa/XVim,pebble8888/XVim,dengcqw/XVim_x,brucehappy/XVim,XVimProject/XVim