Add missing callgraph clean for bindless status flag.
Add test cases. Add support to check special extensions not be available for Vulkan when using GLSL.
Makes some white-space differences in most output, plus a few cases
where more could have been put out but was cut short by the previous
fix-sized buffer.
This is part of the change to have desktop shaders respect precision
qualifiers on Vulkan, but since the defaults are all highp, and that's
different from ES fragment shaders, detect likely cases and warn about
them (but being careful to not be too noisy if it's unlikely to be a
problem).
Sets highp defaults for the appropriate types, for all stages,
and turns on precision qualifiers for non-ES shaders. Required
fixing some qualifier orders for desktop built-in declarations
for pre-420 shaders.
