compiler_wrapper: use crashArtifactsDir to apply clang opts

Since we now have crashArtifactsDir as a more abstract concept, it seems
good to apply '-fcrash-diagnostics-dir=' based on that, rather than
having it as an explicit clang flag.

BUG=chromium:1113442
TEST=FIXME

Change-Id: I147779d7cf8806b3bc712c2998446158e87ec967
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/2343975
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Tested-by: George Burgess <gbiv@chromium.org>
41 files changed