bookmark: Disable -Wformat-truncation around create_bookmark()

GCC 7 and up complain about this false positive when -Wformat-truncation
or -D_FORTIFY_SOURCE is turned on.

Primarily affects simulator builds on hosts with strict defaults.

Change-Id: I385b3c247775e1268b6bbd326b1afc3eb5453db7

apps/bookmark.c

@@ -372,7 +372,13 @@ static bool add_bookmark(const char* bookmark_file_name, const char* bookmark,
     return true;
 }
 
-
+/* GCC 7 and up complain about the snprintf in create_bookmark() when
+   compiled with -D_FORTIFY_SOURCE or -Wformat-truncation
+   This is a false positive, so disable it here only */
+#pragma GCC diagnostic push
+#if __GNUC__ >= 7
+#pragma GCC diagnostic ignored "-Wformat-truncation"
+#endif
 /* ----------------------------------------------------------------------- */
 /* This function takes the system resume data and formats it into a valid  */
 /* bookmark.                                                               */
@@ -441,6 +447,7 @@ static char* create_bookmark()
     else
         return NULL;
 }
+#pragma GCC diagnostic pop /* -Wformat-truncation */
 
 /* ----------------------------------------------------------------------- */
 /* This function will determine if an autoload is necessary.  This is an   */