roll: pw_toolchain, pw_toolchain: Revert "roll: bazel"

This reverts commit 127b5fe73746c3858819beaad83d0416014ce627.

Reason for revert: broke things, should not have landed

Original change's description:
> roll: bazel
>
> From: version:2@7.1.2.7
> To: version:2@7.2.0.7
> Roller-URL: https://ci.chromium.org/b/8745043135247461473
> CQ-Do-Not-Cancel-Tryjobs: true
> Change-Id: Ib7d2d6ec5569c7c0c6766d4a9feae482aba116fd
> Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/216334
> 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>

# Not skipping CQ checks because original CL landed > 1 day ago.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/216312
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>

https://pigweed.googlesource.com/pigweed/pigweed
pw_toolchain, pw_toolchain Rolled-Commits: 8059f92ef1a93df..76f06970fcdd064
Roller-URL: https://ci.chromium.org/b/8744860083213195969
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ie26c8a62b48a03ba672fef229f4f045b7c75b9c4
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/216106
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: 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 073e173..6c8fa3d 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -83,18 +83,18 @@
 git_repository(
     name = "pigweed",
     # ROLL: Warning: this entry is automatically updated.
-    # ROLL: Last updated 2024-06-16.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8744939391938935905.
-    commit = "8059f92ef1a93df94bf7a1fa2d3cae46cf689f30",
+    # ROLL: Last updated 2024-06-17.
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8744860083213195969.
+    commit = "76f06970fcdd064f7a85d3d8ffe779a1cfa91b69",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed.git",
 )
 
 git_repository(
     name = "pw_toolchain",
     # ROLL: Warning: this entry is automatically updated.
-    # ROLL: Last updated 2024-06-16.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8744939391938935905.
-    commit = "8059f92ef1a93df94bf7a1fa2d3cae46cf689f30",
+    # ROLL: Last updated 2024-06-17.
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8744860083213195969.
+    commit = "76f06970fcdd064f7a85d3d8ffe779a1cfa91b69",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed.git",
     strip_prefix = "pw_toolchain_bazel",
 )