aw: Allow 'University of Illinois\/NCSA Open Source' license

This is one of the licenses of third_party/libc++abi

TBR=mnaganov
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/104663010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242239 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 242239