Add support for autobinding

[rcmz]

Issue:

glslang allows for autobinding of uniforms/buffers and input/ouput with --auto-map-bindings and --auto-map-locations.
Could we have a flag to activate this please ?

[antaalt]

Should be easy to add, but the glslang bindings on which I am relying glslang-rs does not allow this as the settings to set this is currently applied after the shader is built, which does nothing. Will need a PR on their side.