fix glib for macos

packages/g/glib/xmake.lua

@@ -10,6 +10,8 @@ package("glib")
     add_deps("meson", "ninja", "libffi", "pcre")
     if is_plat("linux") then
         add_deps("libiconv")
+    elseif is_plat("macosx") then
+        add_deps("gettext")
     end
 
     add_includedirs("include/glib-2.0", "lib/glib-2.0/include")