Rename struct field 'private' to 'priv'.

This broke the LLVM build because 'private' is a C++ keyword.

src/mesa/drivers/dri/intel_winsys/intel_context.c

@@ -212,7 +212,7 @@ intelCreateContext(const __GLcontextModes * visual,
       }
    }
 
-   pipe->private = intel;
+   pipe->priv = intel;
 
    intel->st = st_create_context(pipe, visual, st_share);
 

src/mesa/pipe/p_context.h

@@ -43,7 +43,7 @@ struct pipe_state_cache;
 struct pipe_context {
    struct pipe_winsys *winsys;
 
-   void *private;  /** context private data (for DRI for example) */
+   void *priv;  /** context private data (for DRI for example) */
 
    void (*destroy)( struct pipe_context * );
 

src/mesa/state_tracker/st_cb_flush.c

@@ -72,7 +72,7 @@ void st_flush( struct st_context *st, uint pipeFlushFlags )
       /* Hook for copying "fake" frontbuffer if necessary:
        */
       st->pipe->winsys->flush_frontbuffer( st->pipe->winsys, front_surf,
-                                           st->pipe->private );
+                                           st->pipe->priv );
       st->flags.frontbuffer_dirty = 0;
    }
 }