Update gnome-devel-docs to 3.12.3.


git-svn-id: svn://creme-brulee.marcuscom.com/ports/trunk@19819 df743ca5-7f9a-e211-a948-0013205c9059
Update librsvg2 to 2.40.3.


git-svn-id: svn://creme-brulee.marcuscom.com/ports/trunk@19820 df743ca5-7f9a-e211-a948-0013205c9059