Add release notes for the 10.4.6 release
Add release notes for the 10.4.6 release

Signed-off-by: Emil Velikov <4c996f2f093ddd0585a556460b4cc3ba555546ef@gmail.com>
(cherry picked from commit 542a754524a2b149c178a2f70c05b292c7228fc2)

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler