[recipes] Stop hardcoding PKGDATADIR

[Matthias Clasen <matthiasc src gnome org>]

commit c964e8d4464628b2eef1ae218b4ab93ede961d0e
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Feb 28 07:15:39 2017 -0500

    Stop hardcoding PKGDATADIR
    
    This gets in the way on OS X where we need everything
    to be relocatable for building an app bundle.
    
    Instead of PKGDATADIR, use XDG_DATA_DIRS[0]/gnome-recipes.

 src/gr-utils.c |   15 ++++++++++++++-
 1 files changed, 14 insertions(+), 1 deletions(-)
---
diff --git a/src/gr-utils.c b/src/gr-utils.c
index 07383fa..aea8a71 100644
--- a/src/gr-utils.c
+++ b/src/gr-utils.c
@@ -146,7 +146,20 @@ get_old_user_data_dir (void)
 const char *
 get_pkg_data_dir (void)
 {
-        return PKGDATADIR;
+        static char *dir = NULL;
+
+        if (!dir) {
+                const char * const *dirs;
+
+                dirs = g_get_system_data_dirs ();
+
+                if (dirs)
+                        dir = g_build_filename (dirs[0], PACKAGE_NAME, NULL);
+                else
+                        dir = (char *)PKGDATADIR;
+        }
+
+        return (const char *)dir;
 }
 
 void