gs: upgrade to 4.11

BUG=chromium:478224
TEST=`./cbuildbot/run_tests` passes
TEST=`./gs_unittest --network` passes

Change-Id: I79a6922546a225812ba91a7244b5a5d627623303
Reviewed-on: https://chromium-review.googlesource.com/266442
Reviewed-by: Gabe Black <gabeblack@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
1 file changed