[roll third_party/pigweed] pw_toolchain_bazel: Apply more common attrs to cc_toolchain targets

Forwards tags, compatible_with, target_compatible_with, and
exec_compatible_with to the rules stamped out in cc_toolchain rules to
allow exclusion of these rules from wildcard builds.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/194890

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: f62f5f97e34fc05..8ea97acdb603f7b
Roller-URL: https://ci.chromium.org/b/8754332016854859137
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ic7cdd266f75d2467b8fc1f8872180677497387ad
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/194880
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 f62f5f9..8ea97ac 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit f62f5f97e34fc0568634d6c79412bc44652e6100
+Subproject commit 8ea97acdb603f7bb2ede367500758d9ccde7d7b7