[mutter] MetaRendererNative: Log error reason when failing to create gbm device

[Jonas Ådahl <jadahl src gnome org>]

commit 4ce7d3a772fa7ddc6889b03e7d5378b11b4951c3
Author: Jonas Ådahl <jadahl gmail com>
Date:   Fri Oct 28 15:35:31 2016 +0800

    MetaRendererNative: Log error reason when failing to create gbm device
    
    https://bugzilla.gnome.org/show_bug.cgi?id=773629

 src/backends/native/meta-renderer-native.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/backends/native/meta-renderer-native.c b/src/backends/native/meta-renderer-native.c
index cfaa985..2f0818f 100644
--- a/src/backends/native/meta-renderer-native.c
+++ b/src/backends/native/meta-renderer-native.c
@@ -1263,7 +1263,7 @@ init_gbm (MetaRendererNative *renderer_native,
     {
       g_set_error (error, G_IO_ERROR,
                    G_IO_ERROR_FAILED,
-                   "Failed to create gbm device");
+                   "Failed to create gbm device: %s", g_strerror (errno));
       return FALSE;
     }