build: Enable no-omit-frame-pointer for all non-plain builds

This is useful for local installations with e.g. the `release`
buildtype.
Further more, Fedora has been doing the same system wide and it
apparently was helpful in various ways, see also

Also add -mno-omit-leaf-frame-pointer, like Fedora.

https://blogs.gnome.org/chergert/2023/10/03/what-have-frame-pointers-given-us-anyway/

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3333>

clutter/meson.build

@@ -16,7 +16,6 @@ if buildtype != 'plain'
   if get_option('debug')
     clutter_debug_c_args += [
       '-DCLUTTER_ENABLE_DEBUG',
-      '-fno-omit-frame-pointer',
     ]
   else
     clutter_debug_c_args += [

cogl/meson.build

@@ -90,7 +90,6 @@ if buildtype != 'plain'
       '-DCOGL_GL_DEBUG',
       '-DCOGL_OBJECT_DEBUG',
       '-DCOGL_ENABLE_DEBUG',
-      '-fno-omit-frame-pointer',
     ]
   else
     cogl_debug_c_args += [

meson.build

@@ -467,6 +467,8 @@ add_project_arguments('-D_GNU_SOURCE', language: 'c')
 buildtype = get_option('buildtype')
 if buildtype != 'plain'
   mutter_c_args = [
+    '-fno-omit-frame-pointer',
+    '-mno-omit-leaf-frame-pointer',
     '-fno-strict-aliasing',
     '-Wpointer-arith',
     '-Wmissing-declarations',
@@ -510,7 +512,6 @@ if buildtype != 'plain'
   if get_option('debug')
     mutter_c_args += [
       '-DG_ENABLE_DEBUG',
-      '-fno-omit-frame-pointer',
     ]
   endif
 

mtk/meson.build

@@ -15,11 +15,7 @@ mtk_c_args = [
 
 mtk_debug_c_args = []
 if buildtype != 'plain'
-  if get_option('debug')
-    mtk_debug_c_args += [
-      '-fno-omit-frame-pointer'
-    ]
-  else
+  if not get_option('debug')
     mtk_debug_c_args += [
       '-DG_DISABLE_ASSERT',
       '-DG_DISABLE_CAST_CHECKS',