Merge branch 'master' into core-updates

Conflicts:
	gnu/packages/make-bootstrap.scm

gnu: graphviz: Fix typo.

* gnu/packages/graphviz.scm (graphviz): Fix typo in description.

gnu: Add Graphviz.

* gnu/packages/graphviz.scm: New file.
* Makefile.am (MODULES): Add it.