powerpc. No revision bump because packages never built on base-gcc
archs.
diffs and build testing on ppc from cwen@, thanks!
ok jca@ for vulkan-loader diff
ok sthen@ for spirv-tools and glslang diff
DESCR:
Vulkan is an explicit API, enabling direct control over how GPUs
actually work. As such, Vulkan supports systems that have multiple
GPUs, each running with a different driver, or ICD (Installable Client
Driver). Vulkan also supports multiple global contexts (instances, in
Vulkan terminology). The ICD loader is a library that is placed between
a Vulkan application and any number of Vulkan drivers, in order to
support multiple drivers and the instance-level functionality that
works across these drivers. Additionally, the loader manages inserting
Vulkan layer libraries, such as validation layers, between an
application and the drivers.
