mesa: add driver callbacks for serialising ProgramBinary blobs

Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

src/mesa/main/dd.h

@@ -1126,6 +1126,23 @@ struct dd_function_table {
                                 GLuint64 size,
                                 int fd);
    /*@}*/
+
+   /**
+    * \name GL_ARB_get_program_binary
+    */
+   /*@{*/
+   /**
+    * Calls to retrieve/store a binary serialized copy of the current program.
+    */
+   void (*GetProgramBinaryDriverSHA1)(struct gl_context *ctx, uint8_t *sha1);
+
+   void (*ProgramBinarySerializeDriverBlob)(struct gl_context *ctx,
+                                            struct gl_program *prog);
+
+   void (*ProgramBinaryDeserializeDriverBlob)(struct gl_context *ctx,
+                                              struct gl_shader_program *shProg,
+                                              struct gl_program *prog);
+   /*@}*/
 };