[roll third_party/pigweed] pw_toolchain_bazel: Add misc_files group

Some tools don't have an associated *_files group on a pw_cc_toolchain.
This change enumerates those internally into a misc_files group so they
end up in the all_files list.

Original-Bug: b/305737273
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/184698

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 765f5ffc6791996..3c8f177961affcb
Roller-URL: https://ci.chromium.org/b/8761954518927383665
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: If24b128ecd32df1c84bcd46f266fa5898f57af5b
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/184700
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 765f5ff..3c8f177 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 765f5ffc67919960835c9d05a33dab4d40995c11
+Subproject commit 3c8f177961affcba1a1415fa99c3b8e590aa8e3e