New LLVM license

[ppenzin]

Fort (previously flang) is based on Clang code base and Clang has gotten relicensed a little over a year ago. I think it would be beneficial to relicense this code base as well, partially because the code this project is based on has been relicensed, but also because the easiest way to add Driver and other needed modules is to borrow more code from Clang.

I've added everybody who made non-trivial contributions to flang or fort code base:

• @hyp
• @isanbard
• @doffm
• @gottesmm
• @zeuk
• @ben-brewer-codethink
• @ctgriffiths
• @carlobertolli
• @jleidel

Please comment whether or not you would agree to relicensing the code you've contributed to flang under the new LLVM license.

P.S. This is how I got the list:

$ git ls-files | \
while read f; do \
git blame -w -M -C -C --line-porcelain "$f" | \
grep -I '^author '; \
done | cut -f2 -d'<' | cut -f1 -d'>' | sort -f | uniq -ic | sort -nr
29981 author arphaman
22273 author Petr Penzin
10467 author Bill Wendling
2368 author Mark Doffman
1160 author Michael Gottesman
 132 author zeuk
 130 author Ben Brewer
 107 author Craig Griffiths
  77 author Carlo Bertolli
  27 author John Leidel
  11 author jleidel
   6 author Alex
   3 author Thomas Hindoe Paaboel Andersen
   3 author Paul Osmialowski
   1 author Waldir Pimenta

[jleidel]

@ppenzin, I am definitely amenable to relicensing to the new LLVM license.