[third_party/pigweed] Roll 3 commits

32a60864b622c02 pw_rpc: Introduce pw::rpc::internal::MethodInfo
14267c4f8efbaac pw_software_update: Fix return type for PrepareFor
d249632825dd803 pw_rpc: Update generated code structure

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: dd46587b659063d..32a60864b622c02
Roller-URL: https://ci.chromium.org/b/8835453532067789905
Cq-Cl-Tag: roller-builder:pigweed-sample-project-roller
Cq-Cl-Tag: roller-bid:8835453532067789905
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I5ec31f55908b79eb73fd0146d5f1be5e296097e0
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/sample_project/+/61740
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 dd46587..32a6086 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit dd46587b659063d9430f6d1533545e885c0a5ac2
+Subproject commit 32a60864b622c0270747766bfe6d23423fcb7585