EMGD 1.8 requires libva-1.0.12, so upgrade to that version, and we
don't actually need the 1.0.10 recipe, so remove it.

This also adds -dbg and -dev packaging fixes to fix QA problems,
removes some unnecessary settings, updates checksums, etc.

Also create and use a common libva.inc, as we'll soon be adding a more
updated version of libva to the current version.

Signed-off-by: Tom Zanussi <tom.zanussi@intel.com>

This adds the libva_1.0.10 recipe based on the poky-contrib recipe
by Yu Ke (commit msg copied below).

The original recipe was in meta/recipes-graphics; this patch moves it
to meta-intel/recipes-multimedia since it's multimedia- and
Intel-specific.

The original commit messages (indented):

    libva: add new recpies libva

    libva is a library implementation of "Video Acceleration (VA) API for Linux".
    libva enables and provides access to graphics hardware (GPU) acceleration for
    video processing on Linux and UNIX, includes video decoding, video encoding,
    subpicture blending and rendering.

    This patch add the libva recipes.

Signed-off-by: Yu Ke <ke.yu@intel.com>

    libva: install some missing .so files

Signed-off-by: Dexuan Cui <dexuan.cui@intel.com>

Signed-off-by: Tom Zanussi <tom.zanussi@intel.com>