gobjectIntrospection: fix build on darwin (close #832)

vcunat edit: SANE_MALLOC_PROTOS is gone, removing the handling
https://git.gnome.org/browse/glib/commit/?id=518e3104bf6cdb5d8e6b43d3b721805db5951139
glib: bugfix update (important for ext4 sync)
lcms2: "featured+maintenance" updates

I see nothing potentially dangerous in changelog, and packages seem to build and run.
ghostscript: minor update, a little refactoring

Builds fine, I tried running some apps depending on it.