mate-common-1.5.2: Version bump.
mate-terminal-1.5.0: rekeyword + punt WANT_AUTOMAKE + fixes

Remove crazy WANT_AUTOMAKE=1.9. Fixes install phase see issue 2 [1].

Bring the gtk3 use flag back and mask it.
Bump EAPI to version 5

[1] https://github.com/infirit/mate-overlay/issues/2