[third_party/pigweed] Roll 6 commits

a9707e739fefa6f pw_allocator: Fix SynchonizedAllocator data race
3d2be38e99af311 pw_presubmit: Remove --verbose_explanations flag
69675d0eddb6ce8 pw_transfer: Implement adaptive windowing in Java
0ce38d914d7f6de pw_presubmit: Use _LOG global for logging
1e72e7e55cef252 pw_presubmit: RST format updates
d01aa29f9f9e113 pw_presubmit: Allow disabling hook creation

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: bc6388fd60ff21b..a9707e739fefa6f
Roller-URL: https://ci.chromium.org/b/8749833573077110257
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I2776291775a99f3de425b05b921afa2c8fc6f371
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/206012
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 bc6388f..a9707e7 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit bc6388fd60ff21b4122104864285da010fe90521
+Subproject commit a9707e739fefa6fbaae0a0f4dd2a85b964188baf