mesa: add tessellation shader enums

Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

src/glsl/shader_enums.h

@@ -36,9 +36,11 @@
 typedef enum
 {
    MESA_SHADER_VERTEX = 0,
-   MESA_SHADER_GEOMETRY = 1,
-   MESA_SHADER_FRAGMENT = 2,
-   MESA_SHADER_COMPUTE = 3,
+   MESA_SHADER_TESS_CTRL = 1,
+   MESA_SHADER_TESS_EVAL = 2,
+   MESA_SHADER_GEOMETRY = 3,
+   MESA_SHADER_FRAGMENT = 4,
+   MESA_SHADER_COMPUTE = 5,
 } gl_shader_stage;
 
 #define MESA_SHADER_STAGES (MESA_SHADER_COMPUTE + 1)