[roll third_party/pigweed] pw_assert_basic: Fix BUILD.bazel file

This file was never quite correct, and was not fixed correctly in
http://pwrev.dev/195383.

Original-Bug: 328679085
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/196292

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 6ac2d4b370be1ee..7d55609f2ff182a
Roller-URL: https://ci.chromium.org/b/8753470865339465777
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ica19106f6c3d7cb56f0871a3189bf8f7ff5f5b18
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/196550
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 6ac2d4b..7d55609 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 6ac2d4b370be1eef6bbc1fa0b5951fc60df04af9
+Subproject commit 7d55609f2ff182a07f6bbc13910c9ea911b13e8d