UBUNTU: SAUCE: ima: Downgrade error to warning

BugLink: http://bugs.launchpad.net/bugs/1656908

Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

security/integrity/ima/ima_fs.c

@@ -287,7 +287,7 @@ static ssize_t ima_read_policy(char *path)
 	rc = kernel_read_file_from_path(path, 0, &data, INT_MAX, NULL,
 					READING_POLICY);
 	if (rc < 0) {
-		pr_err("Unable to open file: %s (%d)", path, rc);
+		pr_warn("Unable to open file: %s (%d)", path, rc);
 		return rc;
 	}
 	size = rc;