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I'm not entirely sure what the intention of this code was, but it was
quite old, and the binary distribution for Windows seems to work OK
nonetheless.
Signed-off-by: Austin Seipp <austin@well-typed.com>

It was removed in 9e4e2c24.

The logic is now in mk/compiler-ghc.mk rather than being duplicated in
ghc/Makefile and compiler/Makefile.

From
    http://hackage.haskell.org/trac/ghc/wiki/Building/Architecture/Idiom/PhaseOrdering

Phase 0:
    Includes: package-data.mk files for things built by the
              bootstrapping compiler.
    Builds:   the dependency files for hsc2hs and genprimopcode. We need
              to do this now, as hsc2hs needs to be buildable in phase 1's
              includes (so that we can make the hpc library's .hs source
              files, which in turn is necessary for making its dependency
              files), and genprimopcode needs to be buildable in phase 1's
              includes (so that we can make the primop-*.hs-incl files,
              which are sources for the stage1 compiler library, and thus
              necessary for making its dependency files).
Phase 1:
    Includes: dependency files for things built by the bootstrapping
              compiler.
    Builds:   package-data.mk files for everything else. Note that this
              requires configuring the packages, which means telling cabal
              which ghc to use, and thus the stage1 compiler gets built
              during this phase. 
Phase "":
    Includes: dependency files for everything else.
    Builds:   Everything else. 

now that cross-package deps are tracked correctly.

We no longer use dummy-ghc; instead we don't configure most packages
until the stage1 compiler is available.
  
We also now use Cabal for building the ghc-bin package.

There are a couple more sanity checks too.

You can now run "make test" in the root, and the fast testsuite will be
run with cleaning enabled. It will also put the summary in
testsuite_summary.txt.

We now do all the hard work in a bindistprep subdirectory, and just move
the result to the root directory. This way we can delete anything in
bindistprep/ without worrying about deleting anything important.

Should fix Solaris build failures

We cache the old versions of files generated by configure, so that if
configure touches the file without changing it, we can detect that and
restore the timestamp.

Now that the clean rules don't require libraries/*/ghc.mk, we don't
have to build them on demand.  And having them built on demand
introduced a failure mode (where some libraries have ghc.mk and some
don't).

We still need to sort out the "install-docs" story to get this working
properly.

# -----------------------------------------------------------------------------
#
# (c) 2009 The University of Glasgow
#
# This file is part of the GHC build system.
#
# To understand how the build system works and how to modify it, see
#      http://hackage.haskell.org/trac/ghc/wiki/Building/Architecture
#      http://hackage.haskell.org/trac/ghc/wiki/Building/Modifying
#
# -----------------------------------------------------------------------------

On Windows, we end up doing something like
    rsync c:/build/ghc-6.10.1-unknown-mingw32.tar.bz2 haskell.org:dist
and it thinks that it is meant to get the file from the host called "c".
Now we just do
    rsync ghc-6.10.1-unknown-mingw32.tar.bz2 haskell.org:dist
so rsync understand what we mean.

It will use TH, so needs to be built with stage2.