CHROMIUM: Revert "objtool: Allow alternatives to be ignored"

This reverts commit 6b95f61a41349ef4a115520ac4868bf52555eab9.

The patch causes objdump crashes with RETPOLINE enabled in the Google
toolchain (-mindirect-branch=thunk -mindirect-branch-loop=pause
-fno-jump-tables).

Side effect is that crbug.com/800667 is still seen. For now there
is nothing we can do about that; a warning is better than a crash.

BUG=chromium:800667, chromium:802348
TEST=Build and run on affected systems

Change-Id: I445e99f6efeba009c760f704054e4eff0705427e
Signed-off-by: Guenter Roeck <groeck@chromium.org>
2 files changed