Make sure configuration is saved to storage device

Bug: 20891664

Change-Id: I9bec042155f13bec678944466082a9969e559851
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
diff --git a/src/utils/os_internal.c b/src/utils/os_internal.c
index 77733ad..b8fb2db 100644
--- a/src/utils/os_internal.c
+++ b/src/utils/os_internal.c
@@ -243,6 +243,12 @@
 }
 
 
+int os_fsync(FILE *stream)
+{
+	return 0;
+}
+
+
 void * os_zalloc(size_t size)
 {
 	void *n = os_malloc(size);