Remove some more dependency files from "make clean" that had previously been left behind.
Remove some more dependency files from "make clean" that had previously been
left behind.

BUG=none
TEST=none
Review URL: http://codereview.chromium.org/3322019

git-svn-id: c2a6f690695ec6703fa4e0d44c2dfcc6697c486d@111 55e79e8e-603c-11de-8c10-5fe6993ea61f

mseaborn/seccompsandbox,mseaborn/seccompsandbox,mseaborn/seccompsandbox