Add upstream patches to fix login problems with slow pam modules. Add default-enabled...

Add upstream patches to fix login problems with slow pam modules. Add default-enabled fallback USE flag to pull in metacity (bug #395295, thanks to Octavio Ruiz (Ta^3) for reporting). Use a better systemd service file (bug #396317, thanks to Michał Górny). Ship systemd service file and pam.d files in FILESDIR instead of a separate tarball; these are small files and unlikely to change (bug #396317, comment 8). Punt unused elibc_glibc from IUSE. Move gnome2_src_prepare after eautoreconf.
Forced to drop arm keyword due to gnome-session dependency (bug #390345).

Package-Manager: portage-2.2.0_alpha84/cvs/Linux x86_64