Log Message:
gnumeric: update to 1.12.42.

Gnumeric 1.12.42

Morten:
	* Plug leaks.
	* Introspection fixes.
	* Work around gtk+ breakage re. link colors.
	* Fix problems with ssconvert --export-file-per-sheet.  [#694408]
	* Enable ssconvert --export-file-per-sheet for html, latex, and pdf.
	* Test suite improvements.
	* ssconvert improvements.
	* Makefile improvements.
	* Don't save any configuration when running ssconvert/ssdiff/...
	* Turn GnmFunc into a GObject.
	* Make clipboard output deterministic.
	* Fix conditional format crash [#343].