[roll third_party/pigweed] pw_presubmit: Add Bazel linter

Add Bazel linter using 'buildifier -lint=warn'.

Also fix a couple Bazel formatting/lint issues.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/57443

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 94d45789c7ab7ea..4e78acfde9d8056
Roller-URL: https://ci.chromium.org/b/8838616574220187968
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8838616574220187968
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I2d8e8c3a3a13f5f33898e954a2fee342c3dc03ee
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/57521
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 94d4578..4e78acf 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 94d45789c7ab7eac7e34aedd092b1715c3463529
+Subproject commit 4e78acfde9d8056c089270390b00a90a38e2b4f6