[roll third_party/pigweed] pw_env_setup: Prevent NPM output from interrupting bootstrap

Captures stderr output in the npm environment setup hook to prevent its
output from interrupting the regular bootstrap flow.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/186510

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: a49938f32d4beff..c09ca7786d475d2
Roller-URL: https://ci.chromium.org/b/8759979853682179057
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: If396d384b2966ee0a02436f89f680cf1410c071c
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/186531
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index a49938f..c09ca77 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit a49938f32d4beff6677ca16bfdce9f0aa8e0fc6b
+Subproject commit c09ca7786d475d2dc2d36eed3893c1df4cf540ee