[roll third_party/pigweed] pw_compilation_testing: Do not expand regexes

The PW_NC_EXPECT() regexes are Python raw strings, which may use \ in
non-standard ways. Don't expand the regexes To avoid compiler warnings.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/191030

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 59c0c141e8dab89..14455b147cb3a51
Roller-URL: https://ci.chromium.org/b/8756551557203180225
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ia0efd2e968528f4f89f5e67b2a7bc5e2d100df96
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/191131
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 59c0c14..14455b1 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 59c0c141e8dab8961ad5d0fbbcacdd9aa832121e
+Subproject commit 14455b147cb3a51a53307d9cb112d8f03b0009a6