Rename the testsuite tarball
Rename the testsuite tarball

It's now
    ghc-<version>-testsuite.tar.bz2
rather than
    testsuite-ghc-<version>-src.tar.bz2
which (a) makes more sense, and (b) sorts better in directory listings.

ilyasergey/GHC-XAppFix,ilyasergey/GHC-XAppFix,ilyasergey/GHC-XAppFix,ilyasergey/GHC-XAppFix