[mutter] cogl-pango/meson.build: Remove extraneous quoting

[Jonas Ådahl <jadahl src gnome org>]

commit 73eaf517702a448a4b073ca666413f030ffa8fe1
Author: Daniel van Vugt <daniel van vugt canonical com>
Date:   Thu Oct 10 17:21:13 2019 +0800

    cogl-pango/meson.build: Remove extraneous quoting
    
    It wasn't necessary (see other instances of -DG_LOG_DOMAIN) and somewhere
    along the line it was getting turned into forward slashes becoming a syntax
    error:
    
    ```
    /usr/include/glib-2.0/gobject/gobject.h:767: syntax error, unexpected '/' in
    ...
    g_assertion_message (/"CoglPango/",
    ```
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/841

 cogl/cogl-pango/meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/cogl/cogl-pango/meson.build b/cogl/cogl-pango/meson.build
index 787ec0132..06fba5195 100644
--- a/cogl/cogl-pango/meson.build
+++ b/cogl/cogl-pango/meson.build
@@ -62,7 +62,7 @@ if have_introspection
     ],
     extra_args: introspection_args + [
       '-UCOGL_COMPILATION',
-      '-DG_LOG_DOMAIN=\"CoglPango\"',
+      '-DG_LOG_DOMAIN="CoglPango"',
     ],
     install_dir_gir: pkglibdir,
     install_dir_typelib: pkglibdir,