Buildified the world again.

bzl files were pretty off.

Change-Id: Ief87d7c0a08c6706c8c6c573afef95a6d51968e7
diff --git a/tools/build_rules/label.bzl b/tools/build_rules/label.bzl
index ff02327..1382e1a 100644
--- a/tools/build_rules/label.bzl
+++ b/tools/build_rules/label.bzl
@@ -2,4 +2,4 @@
 # Starlark provides them itself
 
 def expand_label(label):
-  return '%s' % label if ':' in label else '%s:%s' % (label, label.split('/')[-1])
+    return "%s" % label if ":" in label else "%s:%s" % (label, label.split("/")[-1])