ADHD: Add missing #include directives.
ADHD: Add missing #include directives.

Details

  Add missing includes for 'stdio.h' and 'string.h'.

Testing

  No semantic changes.

BUG=chromium-os:19558
TEST=See above.

Change-Id: I98f2327711a69383f36c70792b3fcc97980861bb

drinkcat/adhd,drinkcat/adhd,drinkcat/adhd,drinkcat/adhd,drinkcat/adhd,drinkcat/adhd