Fix type mismatch on extern declarations

Update a few extern declarations to match the original variable type.

Signed-off-by: Vincent Palatin <vpalatin@chromium.org>

BRANCH=none
BUG=none
TEST=make buildall
Compile with LTO enabled and no longer see errors for those
declarations.

Change-Id: I5b0f0f7f498ec414a861cb1ce50a486036c853bd
Reviewed-on: https://chromium-review.googlesource.com/271279
Trybot-Ready: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Alec Berg <alecaberg@chromium.org>
Commit-Queue: Vincent Palatin <vpalatin@chromium.org>
3 files changed