* Update SPIRV libraries
- Update `spirv-cross`
- Update `spirv-tools`
- Update `glslang`
`spirv-tools` contains a fix for an issue we reported (unnecessary promotions to highp in certain expressions).
* Add SPIRV-Tools dependency to matinfo
* Fix post-process shader when not in Vulkan
The post-process shader must not flip the source texture when we compile for OpenGL. This happens because we use SPIR-V/Vulkan as an intermediate format.
* Fix the Android build
We need to output a location when targeting SPIR-V for mobile.
