ghostscript: made symlink `gs` to `gsc` if `gs` wasn't installed already

graphic/ghostscript/ghostscript.conf

@@ -14,3 +14,11 @@
 
 makeinstopt="$makeopt soinstall"
 var_append makeopt ' ' 'so'
+
+ghostscript_install_gs() {
+	if [ ! -e "$root$bindir/gs" ]; then
+		echo_warning 'gs not installed, making a symlink to gsc instead.'
+		ln -s gsc "$root$bindir/gs"
+	fi
+}
+hook_add postmake 5 'ghostscript_install_gs'