LAKITU: Update libcxxabi with libcxx

libcxxabi was merged into libcxx. We need to update both at the same
time to avoid file conflicts.

BUG=b/257271340
TEST=presubmit
RELEASE_NOTE=None

Change-Id: Ic5d38ac1c9c2d7a9ca03e35944cfb226c04495d8
Reviewed-on: https://cos-review.googlesource.com/c/third_party/platform/crosutils/+/40096
Reviewed-by: Vaibhav Rustagi <vaibhavrustagi@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Oleksandr Tymoshenko <ovt@google.com>
1 file changed