docs: sourcetree.html misc updates
docs: sourcetree.html misc updates

A mixed bag of updates/fixes - mostly aiming at removing no longer
applicable directories.

Add a few more state-trackers, drivers, etc. alongside "XXX more" where
applicable. Attribute for the GLSL/NIR movement and nukage of
src/egl/docs.

Signed-off-by: Emil Velikov <f20878473f414da183da19ee25c8722cc1d711e4@collabora.com>
Reviewed-by: Brian Paul <3cb4e1df5ec4da2c7c4af7c52cec8cf340a55a10@vmware.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler