separate gtkmm doc
There should not exist /usr/share/doc/gtkmm-2.4 after install gtkmm
(from redmine: issue id 6929, created on 2017-02-25, closed on 2017-02-28)
- Changesets:
- Revision 5af5484f by Natanael Copa on 2017-02-28T14:33:54Z:
main/gtkmm: split out docs
fixes #6929