Unreviewed build fix.

.:

* GNUmakefile.am: remove bad path for generate-feature-defines-files from EXTRA_DIST.

Tools:

* GNUmakefile.am: add generate-feature-defines-files scripts to EXTRA_DIST.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@144765 268f45cc-cd09-0410-ab3c-d52691b4dbfc