new smaller installers to test

[Graham Percival]

I've tweaked the list of dirs to remove from
share/ghostscript/Resources.  The resulting files are (on average) 5
megs smaller.  linux-x86 works here for me.

Could we get a few tests for various OSes?
    http://lilypond.org/~graham/

(mingw is "mingw-new.exe", to avoid a clash with the nsis 2.4.6 binary
test.  The mingw-new.exe also uses 2.4.6, so if that file works for
you, there's no need to test the older lilypond-blah.exe)

Cheers,
- Graham