Put uninstaller info in correct registry in 64-bit
Put uninstaller info in correct registry in 64-bit

This broken with the changes to detect previous installs.
The problem is minor and only affects users on 64-bit
Windows, who try to install when there are other HP's
installed, and they select the "install anyway; I know what
I'm doing" path.  And it was still uninstallable, even in the
wrong "side" of the registry (the 32-bit side rather than
64-bit side).

This file is used to generate the installe executable so it
is the last step in the build and thus the effect on anything
else should be nothing.

gbaz/haskell-platform,erantapaa/haskell-platform,ardumont/haskell-platform,ardumont/haskell-platform,bgamari/haskell-platform,erantapaa/haskell-platform,thomie/haskell-platform,gbaz/haskell-platform,bgamari/haskell-platform,erantapaa/haskell-platform