roll: pigweed, pw_toolchain: pw_bluetooth: Add att.emb

Introduce Emboss definitions for the Attribute Protocol.

Original-Bug: 326499764
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/216247
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>

https://pigweed.googlesource.com/pigweed/pigweed
pigweed, pw_toolchain Rolled-Commits: 7ad2bee3e541072..c510c7e8e49153d
Roller-URL: https://ci.chromium.org/b/8744258673358366513
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I063e2112ffd9dbcf19f255088b11016d4af13539
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/217674
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/WORKSPACE b/WORKSPACE
index a0dd81b..bbbb863 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -83,18 +83,18 @@
 git_repository(
     name = "pigweed",
     # ROLL: Warning: this entry is automatically updated.
-    # ROLL: Last updated 2024-06-22.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8744394233704695601.
-    commit = "7ad2bee3e541072231d8a59571a235435e36d344",
+    # ROLL: Last updated 2024-06-24.
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8744258673358366513.
+    commit = "c510c7e8e49153dbaf661e341a921fbefda2a94e",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed.git",
 )
 
 git_repository(
     name = "pw_toolchain",
     # ROLL: Warning: this entry is automatically updated.
-    # ROLL: Last updated 2024-06-22.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8744394233704695601.
-    commit = "7ad2bee3e541072231d8a59571a235435e36d344",
+    # ROLL: Last updated 2024-06-24.
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8744258673358366513.
+    commit = "c510c7e8e49153dbaf661e341a921fbefda2a94e",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed.git",
     strip_prefix = "pw_toolchain_bazel",
 )