add system libXNVCtrl library support in linux unbundle

originally developed here:
https://github.com/pld-linux/chromium-browser/commits/ea209591465e59e433cbb231270088a3d45658a2/system-libxnvctrl.patch

reviewed by phajdan.jr in private mail exchange

R=phajdan.jr@chromium.org
BUG=

Review URL: https://codereview.chromium.org/120533002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250495 0039d316-1c4b-4281-b951-d872f2087c98
Mention wildcards in web_accessible_resources documentation

BUG=276202

Review URL: https://codereview.chromium.org/159683002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250496 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250496