compiler_wrapper: adds ${sysroot}/usr/lib to linker path

This change has been in chromiumos-overlay for a while now, but it
apparently wasn't ever committed to toolchain-utils.

BUG=b:209649372
TEST=This has been in prod for ages.

Change-Id: Ied0b519f2f30ef275e921f41e6dbdee9c9442d03
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/3321723
Tested-by: Christopher Di Bella <cjdb@google.com>
Auto-Submit: Christopher Di Bella <cjdb@google.com>
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Commit-Queue: Manoj Gupta <manojgupta@chromium.org>
43 files changed