buildifier fixes

Author: nikhilm

rust/private/rust.bzl

@@ -647,14 +647,14 @@ _common_attrs = {
         default = "@bazel_tools//tools/cpp:current_cc_toolchain",
     ),
     "_error_format": attr.label(default = "//:error_format"),
-    "_process_wrapper": attr.label(
-        default = Label("//util/process_wrapper"),
+    "_persistent_worker": attr.label(
+        default = Label("//util/worker"),
         executable = True,
         allow_single_file = True,
         cfg = "exec",
     ),
-    "_persistent_worker": attr.label(
-        default = Label("//util/worker"),
+    "_process_wrapper": attr.label(
+        default = Label("//util/process_wrapper"),
         executable = True,
         allow_single_file = True,
         cfg = "exec",

rust/private/rustc.bzl

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 # buildifier: disable=module-docstring
+load("@bazel_skylib//rules:common_settings.bzl", "BuildSettingInfo")
 load(
     "@bazel_tools//tools/build_defs/cc:action_names.bzl",
     "CPP_LINK_EXECUTABLE_ACTION_NAME",
@@ -28,7 +29,6 @@ load(
     "relativize",
     "rule_attrs",
 )
-load("@bazel_skylib//rules:common_settings.bzl", "BuildSettingInfo")
 
 BuildInfo = provider(
     doc = "A provider containing `rustc` build settings for a given Crate.",
@@ -574,8 +574,8 @@ def rustc_compile_action(
         ]
         executable = ctx.executable._persistent_worker
         execution_requirements = {
-            "supports-workers": "1",
             "requires-worker-protocol": "proto",
+            "supports-workers": "1",
         }
 
     ctx.actions.run(