[third_party/pigweed] Roll 2 commits

ff21b928c01c169 pw_build: Add pw_elf_to_dump rule
ee4eea8fda11b8d pw_digital_io_linux: Add trigger option to CLI wat

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: eee966337afe905..ff21b928c01c169
Roller-URL: https://ci.chromium.org/b/8746366335756751169
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I5e3a5eef166fa9a23210347ccc2978a9ce5aa6b9
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/213073
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.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 eee9663..ff21b92 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit eee966337afe9053f6ab443f612db454eca7a150
+Subproject commit ff21b928c01c169ec6f097ce396f9da5940bff15