[mutter] build: Fix typo

[Florian Müllner <fmuellner src gnome org>]

commit c50ae726a9e58cc95cfe7f47f397e6a6a65ab097
Author: Florian Müllner <fmuellner gnome org>
Date:   Wed Nov 23 21:58:13 2016 +0100

    build: Fix typo

 src/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index 30ef640..ab5a26c 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -92,7 +92,7 @@ libmutter_la_SOURCES =                                \
        backends/meta-cursor-renderer.c         \
        backends/meta-cursor-renderer.h         \
        backends/meta-egl.c                     \
-       backneds/meta-egl.h                     \
+       backends/meta-egl.h                     \
        backends/meta-display-config-shared.h   \
        backends/meta-idle-monitor.c            \
        backends/meta-idle-monitor-private.h    \