update_engine: Run clang-format on common/

BUG=none
TEST=unittest

Change-Id: Icdaf5017e03a197bc576f08f4b8dcdd00cff217c
Reviewed-on: https://chromium-review.googlesource.com/1407541
Commit-Ready: Amin Hassani <ahassani@chromium.org>
Tested-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Sen Jiang <senj@chromium.org>
diff --git a/common/fake_boot_control.h b/common/fake_boot_control.h
index ba975a2..3d65075 100644
--- a/common/fake_boot_control.h
+++ b/common/fake_boot_control.h
@@ -89,9 +89,7 @@
     devices_.resize(num_slots_);
   }
 
-  void SetCurrentSlot(BootControlInterface::Slot slot) {
-    current_slot_ = slot;
-  }
+  void SetCurrentSlot(BootControlInterface::Slot slot) { current_slot_ = slot; }
 
   void SetPartitionDevice(const std::string& partition_name,
                           BootControlInterface::Slot slot,