[roll third_party/pigweed] pw_cli: Add pw ffx alias

A bit rough around the edges as it prints the PIGWEED banner and bazel
analysis/loading messages, but still functional nonetheless.

Suitable for now since the ffx team is working on other solutions
(eg: stub launcher) to just run `ffx` anywhere and have it use the
correct sdk's ffx.

Original-Fixed: 329933586
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/200770

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: c00280eb8a57494..917b5b7db5b6bba
Roller-URL: https://ci.chromium.org/b/8752258444694706225
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I6f10f66d433c28f8feff4afec51561681d2ac565
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/200853
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index c00280e..917b5b7 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit c00280eb8a57494e2fb368948fbae55cd4a571c5
+Subproject commit 917b5b7db5b6bba47b29a3fa5befff0caf155073