[roll pigweed] pw_toolchain: Always set pw_toolchain_CLANG_PREFIX

Sets pw_toolchain_CLANG_PREFIX to directly point to the clang/gcc
compilers pulled down by CIPD rather than assuming the correct binaries
are on the system PATH.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/106750

https://pigweed.googlesource.com/pigweed/pigweed
pigweed Rolled-Commits: 17883430a890cbc..64fb8479feb4af3
Roller-URL: https://ci.chromium.org/b/8805663375690489121
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I9e0a5d7bc49ca3b5aff9fb09227d267c1d6536cb
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/zephyr-integration/+/106678
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
1 file changed
tree: bf14bf517bb39c091b9c0cedd70ce633c061016a
  1. .gitmodules
  2. test.sh