Fixes for building binaries

• binaries: Update README.md

  The newer Meson version is needed for glib.

  The minimum version of MinGW is needed for pango.

• binaries: Support platforms that put libraries into lib64/

• binaries: Fix ghostscript compilation problem

  Filed as

  https://bugs.ghostscript.com/show_bug.cgi?id=708267

• binaries: Avoid accidental use of auto(re)conf while compiling Guile

• binaries: Fix linking of LilyPond with mingw

  Using MinGW-w64 version 11.0.1, linking LilyPond failed with

  undefined reference to `BCryptGenRandom'

  What changed in new versions of MinGW is that it advertises at least Windows version 7 and thus assumes and links to -lbcrypt.

  We fix this by pretending that 'libbcrypt' is not available.