i965/fs: Handle nir shared variable store intrinsic
i965/fs: Handle nir shared variable store intrinsic

v4:
 * Apply similar optimization for shared variable stores as
   0cb7d7b4b7c32246d4c4225a1d17d7ff79a7526d. This was causing a
   OpenGLES 3.1 CTS failure, but
   867c436ca841b4196b4dde4786f5086c76b20dd7 fixes that.

Signed-off-by: Jordan Justen <a79006884ba9cf5f4f7fcbb92a15b208780d8c97@intel.com>
Reviewed-by: Iago Toral Quiroga <a847aabaac44184372f6b1cd1a59aa254daaeb0b@igalia.com>
Reviewed-by: Kristian Høgsberg <ca9b5b1e27d4fa7f4ba6848bdd08ca52cfd6330c@bitplanet.net>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler