roll: pigweed, pw_toolchain: pw_preprocessor: Expand comment for PW_PACKED

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/226994
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>

https://pigweed.googlesource.com/pigweed/pigweed
pigweed, pw_toolchain Rolled-Commits: d33bfc0c1620bdb..cc53189f14208ac
Roller-URL: https://ci.chromium.org/b/8739678120118658225
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I572da513fcd07fab5ec5957ce4e12e5dd89d7904
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/showcase/sense/+/229455
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
diff --git a/MODULE.bazel b/MODULE.bazel
index 8f90373..552f509 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -48,8 +48,8 @@
     module_name = "pigweed",
     # ROLL: Warning: this entry is automatically updated.
     # ROLL: Last updated 2024-08-13.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8739681433301582257.
-    commit = "d33bfc0c1620bdb695f093efa67248ea131e898a",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8739678120118658225.
+    commit = "cc53189f14208ac7897872285c547c516706a81e",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed",
 )
 
@@ -57,8 +57,8 @@
     module_name = "pw_toolchain",
     # ROLL: Warning: this entry is automatically updated.
     # ROLL: Last updated 2024-08-13.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8739681433301582257.
-    commit = "d33bfc0c1620bdb695f093efa67248ea131e898a",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8739678120118658225.
+    commit = "cc53189f14208ac7897872285c547c516706a81e",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed",
     strip_prefix = "pw_toolchain_bazel",
 )