mesa/program: add hw atomic counter file

This is needed for the GLSL->TGSI translation for hw atomic counters.

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Tested-By: Gert Wollny <gw.fossdev@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

src/mesa/main/mtypes.h

@@ -2060,6 +2060,7 @@ typedef enum
    PROGRAM_BUFFER,      /**< for shader buffers, compile-time only */
    PROGRAM_MEMORY,      /**< for shared, global and local memory */
    PROGRAM_IMAGE,       /**< for shader images, compile-time only */
+   PROGRAM_HW_ATOMIC,   /**< for hw atomic counters, compile-time only */
    PROGRAM_FILE_MAX
 } gl_register_file;