[roll third_party/pigweed] bazel: Don't disable use_header_modules

There were some old reports that this feature doesn't work with
`-fno-rtti` (b/137799263), but nothing breaks if it's not disabled.
Tested this internally, too (cl/578609723).

Original-Bug: b/267498492
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/178565

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 741063cb923f579..a1d2da971f308ed
Roller-URL: https://ci.chromium.org/b/8765137722469104273
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I941918a434b78dd7f5ea21a6a2f8a0ff59e7d1e7
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/179211
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 741063c..a1d2da9 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 741063cb923f5794b3724d10e1968dcb1e72bc84
+Subproject commit a1d2da971f308ed305e60a62e3106a4f37fcbb31