i965: free object labels when deleting

Some leaks detected with GL_KHR_debug on i965.

CC: Timothy Arceri <t_arceri@yahoo.com.au>
Signed-off-by: Sergii Romantsov <sergii.romantsov@globallogic.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

src/mesa/drivers/dri/i965/brw_queryobj.c

@@ -239,6 +239,7 @@ brw_delete_query(struct gl_context *ctx, struct gl_query_object *q)
    struct brw_query_object *query = (struct brw_query_object *)q;
 
    brw_bo_unreference(query->bo);
+   free(query->Base.Label);
    free(query);
 }
 

src/mesa/drivers/dri/i965/brw_sync.c

@@ -354,6 +354,7 @@ brw_gl_delete_sync(struct gl_context *ctx, struct gl_sync_object *_sync)
    struct brw_gl_sync *sync = (struct brw_gl_sync *) _sync;
 
    brw_fence_finish(&sync->fence);
+   free(sync->gl.Label);
    free(sync);
 }
 

src/mesa/drivers/dri/i965/gen6_sol.c

@@ -218,6 +218,7 @@ brw_delete_transform_feedback(struct gl_context *ctx,
    brw_bo_unreference(brw_obj->offset_bo);
    brw_bo_unreference(brw_obj->prim_count_bo);
 
+   free(obj->Label);
    free(brw_obj);
 }