[gitg] libgitg: fix linking on macOS

[Alberto Fanjul <albfan src gnome org>]

commit 67f2d202d5bc323716da0c7690767ea08a1a42b4
Author: Tom Schoonjans <Tom Schoonjans diamond ac uk>
Date:   Wed Oct 24 08:28:26 2018 +0100

    libgitg: fix linking on macOS

 libgitg/meson.build | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)
---
diff --git a/libgitg/meson.build b/libgitg/meson.build
index f7424960..85cebf87 100644
--- a/libgitg/meson.build
+++ b/libgitg/meson.build
@@ -112,14 +112,9 @@ if gdk_targets.contains('quartz')
   sources += files('gitg-platform-support-osx.c')
   deps += [
     dependency('gio-unix-2.0'),
-    find_library('objc'),
+    dependency('appleframeworks', modules : ['foundation', 'appkit'])
   ]
   cflags += '-xobjective-c'
-
-  ldflags += cc.get_supported_link_arguments([
-    '-framework Foundation',
-    '-framework AppKit',
-  ])
 elif gdk_targets.contains('win32')
   sources += files('gitg-platform-support-win32.c')
   deps += dependency('gio-windows-2.0')