message: Updated LICENSE.txt with lit software
diff: @@ -71,13 +71,20 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  ---------------------------------------------------------------------------
  +The following piece of code is incorporated to ISPC repository from LLVM
  +software. It has alternate copyright and it is distributed under license
  +listed below in this section:
  +Program Directory
  +------- ---------
  +lit utils/lit
  +
  Binary distributions of ISPC are linked with the LLVM libraries, which are
  covered by the following license:
  University of Illinois/NCSA
  Open Source License
  -Copyright (c) 2003-2014 University of Illinois at Urbana-Champaign.
  +Copyright (c) 2003-2018 University of Illinois at Urbana-Champaign.
  All rights reserved.
  Developed by:
  