backends: maemo: fix syntax error and automake

commit e88bfa62 ("C++: automatically determine iterator types") broke the validity of the MaemoCalendarSource.cpp by accident.

Also add the necessary dbus CFLAGS/LIBS flags to ensure successful compilation

commit e88bfa62 Author: Patrick Ohly patrick.ohly@intel.com AuthorDate: Wed Jan 31 17:28:28 2018 +0100 Commit: Patrick Ohly patrick.ohly@intel.com CommitDate: Sat Dec 5 21:28:08 2020 +0100

C++: automatically determine iterator types