[third_party/pigweed] Roll 2 commits

f39e03d8ec13490 pw_channel: Enable GetWriteAllocator function
0002cea68b95854 pw_web: NPM version bump to 0.0.16

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: ca0edf4ec6724a1..f39e03d8ec13490
Roller-URL: https://ci.chromium.org/b/8752892994912965953
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I7c055e746d37291fa50d08094607920de98170f1
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/198430
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 ca0edf4..f39e03d 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit ca0edf4ec6724a1bfe2daa3252bed71c5aa7611b
+Subproject commit f39e03d8ec13490ecd7917b09f4c32655f3b37e5