[gitg] Add missing cairo includes

[Jesse van den Kieboom <jessevdk src gnome org>]

commit 68a9c4bd3e9d2796d9a88cb552255adc1e991dc6
Author: Jesse van den Kieboom <jessevdk gnome org>
Date:   Tue Jan 5 19:54:47 2016 +0100

    Add missing cairo includes
    
    Bug https://bugzilla.gnome.org/show_bug.cgi?id=760173.

 libgitg/gitg-platform-support.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/libgitg/gitg-platform-support.c b/libgitg/gitg-platform-support.c
index 9f2e9f8..c399377 100644
--- a/libgitg/gitg-platform-support.c
+++ b/libgitg/gitg-platform-support.c
@@ -28,6 +28,9 @@
 #include <sys/types.h>
 #include <pwd.h>
 
+#include <cairo.h>
+#include <cairo/cairo-xlib.h>
+
 gboolean
 gitg_platform_support_use_native_window_controls (GdkDisplay *display)
 {