libglvnd: migrate from meta-oe

libglvnd: migrate from meta-oe

libglvnd is a vendor-neutral approach to handling OpenGL / OpenGL ES /
EGL / GLX libraries. It has been proposed and initially implemented by
NVIDIA in order to simplify coinstallation of GL drivers provided by
different vendors. Major Linux distributions (Debian, Ubuntu, Fedora,
etc.) have already switched to libglvnd.

Having libglvnd in OE-Core simplifies integration of this ABI into
distro and BSP layers (e.g. it will help meta-tegra, which currently
provides its own version of the recipe).

Import recipe for libglvnd from the meta-oe layer (changes: fix virtual
package names, add add the SUMMARY data, drop git@ from SRC_URI, require
glvnd DISTRO_FEATURE).

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>