[Tizen] Specify and ship the proper licenses in the spec file.

Now that we do not care about Tizen 2.x support anymore, we can uncomment
out the lines in the spec file that ship and define the right licenses for
the Crosswalk package.

BUG=XWALK-229
Merge pull request #1673 from rakuco/fix-licensing-spec-files

[Tizen] Specify and ship the proper licenses in the spec file.