roll: third_party/pigweed 2a19596..e19579b (3 commits)

e19579b:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/433052 Revert "Reland "roll: Clang and Rust toolchain packages""
6e18abc:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/432952 Reland "roll: Clang and Rust toolchain packages"
1867c58:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/432892 Revert "roll: Clang and Rust toolchain packages"

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 2a19596193d1fc..e19579be5a6be9
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8676970096754435921
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I374b4fc89ae632166579a6c8c69317dcf359398e
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/433092
diff --git a/third_party/pigweed b/third_party/pigweed
index 2a19596..e19579b 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 2a19596193d1fc46dd3238cb4a037fb92afe0861
+Subproject commit e19579be5a6be9010eb30e266a65692ce7f1f59f