run-webkit-tests should count tests submitted as absolute paths once
https://bugs.webkit.org/show_bug.cgi?id=136848

Patch by Youenn Fablet <youenn.fablet@crf.canon.fr> on 2014-09-21
Reviewed by Darin Adler.

* Scripts/webkitpy/port/base.py:
(Port._expanded_paths): In case of absolute path, do not search for platform specific tests.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@173798 268f45cc-cd09-0410-ab3c-d52691b4dbfc