[roll third_party/pigweed] pw_env_setup: Fix order of PATH

With this, entries in CIPD that come later in the environment config
file come earlier in PATH.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/110630

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: f5c5c1f7d14da88..9ef91a13a3578ba
Roller-URL: https://ci.chromium.org/b/8802205132683946145
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I88eb5c3a31f7da57f34f191709ecd69f7c0e1ca8
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/111792
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index f5c5c1f..9ef91a1 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit f5c5c1f7d14da884c4d65755c140c6bab2d46727
+Subproject commit 9ef91a13a3578ba92d1d3dbb52db278797766f09