[network-manager-applet] libnm-gtk: fix build in tests

[Jiří Klimeš <jklimes src gnome org>]

commit 62dffb9b8cdef9776f62be356dd6017e1e03e5f4
Author: Jiří Klimeš <jklimes redhat com>
Date:   Fri Feb 27 10:56:12 2015 +0100

    libnm-gtk: fix build in tests

 src/libnm-gtk/tests/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/libnm-gtk/tests/Makefile.am b/src/libnm-gtk/tests/Makefile.am
index 39b2489..cc50e25 100644
--- a/src/libnm-gtk/tests/Makefile.am
+++ b/src/libnm-gtk/tests/Makefile.am
@@ -6,6 +6,7 @@ test_mobile_providers_SOURCES = \
        test-mobile-providers.c
 
 test_mobile_providers_CPPFLAGS = \
+       $(GTK_CFLAGS) \
        $(LIBNM_GLIB_CFLAGS) \
        -I$(top_srcdir) \
        -I$(top_srcdir)/src/libnm-gtk \