toolchain-utils: Sync compiler wrapper changes with llvm changes.

This updates the compiler wrapper flags to match recent updates to
compiler wrapper in sys-devel/llvm (for llvm-next).

BUG=chromium:1133468
TEST=None

Change-Id: Ibab9f0e1d0e35db3ba838e70a812efe2d5137a0a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/2448871
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Commit-Queue: Caroline Tice <cmtice@chromium.org>
Tested-by: Caroline Tice <cmtice@chromium.org>
6 files changed