[gnome-builder] application: add string.h for strstr()

[Christian Hergert <chergert src gnome org>]

commit 4b6cb93a229ee7982ebf28537c753c0330de2fd3
Author: Christian Hergert <christian hergert me>
Date:   Sun Feb 21 12:49:46 2016 -0800

    application: add string.h for strstr()

 libide/ide-application-tests.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/libide/ide-application-tests.c b/libide/ide-application-tests.c
index 538aa93..06ba8a0 100644
--- a/libide/ide-application-tests.c
+++ b/libide/ide-application-tests.c
@@ -19,6 +19,7 @@
 #define G_LOG_DOMAIN "ide-application-tests"
 
 #include <stdlib.h>
+#include <string.h>
 
 #include "ide-application-private.h"
 #include "ide-application-tests.h"