engrampa: update dependencies and Suggests/Recommends

as per http://anonscm.debian.org/cgit/pkg-mate/engrampa.git/commit/debian/control?id=078c0dab499fe3cbaa536917a58f6e8cb8315f99
and http://anonscm.debian.org/cgit/pkg-mate/engrampa.git/commit/debian/control?id=b18c51fe700f8dee9ba768baaa8a806757e2bdd7