media-libs/alsa-lib: version bump to 1.1.0

media-libs/alsa-lib: version bump to 1.1.0

Bump to version 1.1.0. The cross-compile patch for 1.0.29 does not
appear to be needed, so not carrying it forward for 1.1.0. Mask all
architectures until deemed 'stable' by gentoo-sound team.

TODO: Version 1.1.0 does introduce the DSP Topology API. This is enabled
by default, though there is a configure flag to disable it. There are
kernel configuration and ABI version considerations to account for in
any future "topology" USE flag handlers-- I haven't sufficient expertise
to "do it right" at this time, or I would do so.

Rudimentary bench-testing performed on amd64 architecture.

ALSA Project Release notes at:
    http://www.alsa-project.org/main/index.php/Changes_v1.0.29_v1.1.0

Package-Manager: Portage 2.2.20.1

v2: vapier: restored line 37, '# https://bugs.gentoo.org/509886';
    rebased on 6d4b41d7904e ("app-emulation/docker-compose: move enum34
    dependence")

Signed-off-by: Joe Konno <joe.konno@intel.com>