debugd: Fix coding style and cpplint issues.

BUG=chromium:385849
TEST=`FEATURES=test emerge-$BOARD platform2`
TEST=`cpplint.py --root=src --filter=-build/include src/{*.h,*.cc,*/*.cc}`

Change-Id: Ia2475d6ee287dc727c3b2ffe139e9cc8bfe2e2e5
Reviewed-on: https://chromium-review.googlesource.com/204391
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
Commit-Queue: Ben Chan <benchan@chromium.org>
diff --git a/debugd/src/icmp_tool.cc b/debugd/src/icmp_tool.cc
index cc28f31..488fd12 100644
--- a/debugd/src/icmp_tool.cc
+++ b/debugd/src/icmp_tool.cc
@@ -51,4 +51,4 @@
   return out;
 }
 
-};  // namespace debugd
+}  // namespace debugd