workspace: Adding bazel build formatter/linter

Adds in buildifier bazel targets that autoformat/lint the entire
WORKSPACE. This can be invoked by running;

'bazel run //:buildifier'

or

'bazel run //:buildifier_test'

Change-Id: Iaaf7f6241e29894eca94aa6b5d0ca3b33255b7f7
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/36160
Reviewed-by: Keir Mierle <keir@google.com>
Commit-Queue: Keir Mierle <keir@google.com>
diff --git a/pw_sync_embos/BUILD b/pw_sync_embos/BUILD
index da66e9e..1a18120 100644
--- a/pw_sync_embos/BUILD
+++ b/pw_sync_embos/BUILD
@@ -85,7 +85,6 @@
     ],
 )
 
-
 pw_cc_library(
     name = "mutex_headers",
     hdrs = [
@@ -138,13 +137,12 @@
     ],
     deps = [
         ":timed_mutex_headers",
+        "//pw_chrono_embos:system_clock_headers",
         "//pw_interrupt:context",
         "//pw_sync:timed_mutex_facade",
-        "//pw_chrono_embos:system_clock_headers",
     ],
 )
 
-
 pw_cc_library(
     name = "interrupt_spin_lock_headers",
     hdrs = [
@@ -171,4 +169,3 @@
         "//pw_sync:interrupt_spin_lock_facade",
     ],
 )
-