mesa: add missing formats to driGLFormatToImageFormat
mesa: add missing formats to driGLFormatToImageFormat

Fixes following dEQP tests:

   dEQP-EGL.functional.image.api.create_image_gles2_tex2d_luminance
   dEQP-EGL.functional.image.api.create_image_gles2_tex2d_luminance_alpha

Signed-off-by: Tapani Pälli <cdcb67a5e49297de94340ca09f25994bd5e7f762@intel.com>
Reviewed-by: Emil Velikov <f20878473f414da183da19ee25c8722cc1d711e4@collabora.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=98328

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler