update_engine: Run clang-format on payload_consumer

We just did a AOSP merge, so it is a good time to clean things up.

BUG=none
TEST=unittest

Change-Id: I4fe9cef5eb8709344d6b78bc298c0f1c03308ffc
Reviewed-on: https://chromium-review.googlesource.com/1407540
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Sen Jiang <senj@chromium.org>
Reviewed-by: Xiaochu Liu <xiaochu@chromium.org>
diff --git a/payload_consumer/file_descriptor.cc b/payload_consumer/file_descriptor.cc
index 4eabb8f..1de615c 100644
--- a/payload_consumer/file_descriptor.cc
+++ b/payload_consumer/file_descriptor.cc
@@ -89,7 +89,7 @@
   // operations.
 #ifndef BLKZEROOUT
   return false;
-#else  // defined(BLKZEROOUT)
+#else   // defined(BLKZEROOUT)
   DCHECK(request == BLKDISCARD || request == BLKZEROOUT ||
          request == BLKSECDISCARD);
   // On some devices, the BLKDISCARD will actually read back as zeros, instead