ghc-hamlet-1.2.0-bp150.2.3

- Disable Haddock phase. This library exports no modules when build
  with recent compilers, and therefore attempts to generate the
  documentation fail.

- Updated with latest spec-cleaner version 0.9.8-8-geadfbbf.

- Update to version 1.2.0 revision 0 with cabal2obs.