Add a recipe for vulkan loader library and the vulkaninfo binary.
Vulkan can be built to support X11 or wayland or both. There is
currently no support for building tests, validation layers or even
the demos as that would require a bunch of otherwise unnecessary
dependencies.
Fix the build on musl by defaulting to getenv() if secure_getenv()
is not available.
Signed-off-by: Jussi Kukkonen <jussi.kukkonen@intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
