lint: test for assembler dialect switches

We prefer the default AT&T dialect on x86

Change-Id: I7a5778c82ab5df6e971dfc73e98373893cfeeb92
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: https://review.coreboot.org/13135
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)

util/lint/lint-stable-010-asm-syntax

@@ -0,0 +1,18 @@
+#!/bin/sh
+# This file is part of the coreboot project.
+#
+# Copyright 2016 Google Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# DESCR: Check that we use a single assembler syntax
+
+LC_ALL=C export LC_ALL
+git grep -n "\.\(att\|intel\)_syntax\>"