Update outdated header for files generated by action_derivedsourcesallinone.py

The header mentioned a make_jni_lists.py script which no longer exists.

NOTRY=true
R=haraken

Review URL: https://chromiumcodereview.appspot.com/22571002

git-svn-id: svn://svn.chromium.org/blink/trunk@155683 bbb929c8-8fbe-4397-9dbb-9b2b20218538