- bring back including haddock-generated lib docs, now under docdir/ghc
    - fix macros.ghc filepath (#460304)
    - spec file cleanups:
    - fix the source urls back
    - drop requires chkconfig
    - do not override __spec_install_post
    - override _target_platform so we can use %%configure
    - setup docs building in build.mk
    - no longer need to remove network/include/Typeable.h
    - install binaries under libdir not libexec
    - remove hsc2hs and runhaskell binaries since are alternatives