Unpin from legacy pass manager for msan builds

The upstream fix (https://reviews.llvm.org/D96936)
has landed in stable Clang.

Bug: 1185183
Change-Id: I23d2e7c9421e55b42c9dc7ec6f9980f6291beac4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2827169
Auto-Submit: Arthur Eubanks <aeubanks@google.com>
Reviewed-by: Hans Wennborg <hans@chromium.org>
Commit-Queue: Hans Wennborg <hans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#872797}
GitOrigin-RevId: 33ed1e4b07155ed96a765c31b4a07b9de3ef8d4d
1 file changed