3rdparty/chromeec: Update to latest master

Includes the necessary changes to build with gcc 8.1

Change-Id: Ie8c3dede4d702ab7838162dbff09f94df34b7c91
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: https://review.coreboot.org/26453
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
diff --git a/3rdparty/chromeec b/3rdparty/chromeec
index 927b64a..11bd4c0 160000
--- a/3rdparty/chromeec
+++ b/3rdparty/chromeec
@@ -1 +1 @@
-Subproject commit 927b64a0ba8f6362daf2e9a6c7eabf23815ae95a
+Subproject commit 11bd4c0f4d11357ab830982d7dec164813c886dd