xcbuild: exit with error if --find fails

Changed files
+1 -1
pkgs
development
tools
xcbuild
+1 -1
pkgs/development/tools/xcbuild/wrapper.nix
···
--toolchain | -toolchain) shift ;;
--find | -find | -f)
shift
-
command -v $1 ;;
+
command -v $1 || exit 1 ;;
--log | -log) ;; # noop
--verbose | -verbose) ;; # noop
--no-cache | -no-cache) ;; # noop