This change supports '!' and '/' operators for 'dependencies' section.
This change supports '!' and '/' operators for 'dependencies' section.

The list filters are not supported for 'dependencies' sections for now, and
this change supports them.
http://code.google.com/p/gyp/wiki/InputFormatReference#List_Filters

Patch by Yuki Shiino <yukishiino@google.com>
Review URL: http://codereview.chromium.org/6904020
witwall/gyp,witwall/gyp,witwall/gyp,witwall/gyp,witwall/gyp