[roll] Roll third_party/pigweed targets/fuchsia: (reland) Make Fuchsia configuration a platform

This is how Pigweed prefers to spec out platform configurations in
Bazel, since it makes configurations easier to find and more powerful.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/351760
Copybara-Verified: Copybara Prod <copybara-worker-blackhole@google.com>
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Original-Revision: 755ea2fe3fbbb9d5cea4fbd66e7a76b47d1fc84d

Rolled-Repo: https://fuchsia.googlesource.com/third_party/pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: a8fc41aa04ed2a..755ea2fe3fbbb9
Roller-URL: https://cr-buildbucket.appspot.com/build/8696030348094999281
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I0d20b20ba0ca4343e8f4dcc5c8fb9ebbab79c8b3
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1444592
Commit-Queue: GI Roller <global-integration-roller@fuchsia-infra.iam.gserviceaccount.com>

Author: Armando Montanez

manifests/third_party/all

@@ -427,7 +427,7 @@
              path="third_party/pigweed/src"
              remote="https://fuchsia.googlesource.com/third_party/pigweed.googlesource.com/pigweed/pigweed"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="a8fc41aa04ed2a0ff6a2b3a403ffa2bb824477ba"/>
+             revision="755ea2fe3fbbb9d5cea4fbd66e7a76b47d1fc84d"/>
     <project name="third_party/github.com/google/python_portpicker"
              path="third_party/python_portpicker/src"
              remote="https://fuchsia.googlesource.com/third_party/github.com/google/python_portpicker"