update_engine: Run clang-format on payload_generator/

BUG=none
TEST=unittest

Change-Id: I00cafb1fc709d8f02119cb0058cfcb0b573ef25d
Reviewed-on: https://chromium-review.googlesource.com/1409927
Commit-Ready: Amin Hassani <ahassani@chromium.org>
Tested-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Sen Jiang <senj@chromium.org>
diff --git a/payload_generator/filesystem_interface.h b/payload_generator/filesystem_interface.h
index 08dfd19..d04295c 100644
--- a/payload_generator/filesystem_interface.h
+++ b/payload_generator/filesystem_interface.h
@@ -45,9 +45,7 @@
   // all sort of files, like symlinks, hardlinks, directories and even a file
   // entry representing the metadata, free space, journaling data, etc.
   struct File {
-    File() {
-      memset(&file_stat, 0, sizeof(file_stat));
-    }
+    File() { memset(&file_stat, 0, sizeof(file_stat)); }
 
     // The stat struct for the file. This is invalid (inode 0) for some
     // pseudo-files.