nghttpx: Add missing Downstream::end_upload_data() call in HTTP/2 and SPDY

This ensures that all frontend code calls
Downstream::end_upload_data() when request was all received.

src/shrpx_http2_upstream.cc

@@ -273,6 +273,7 @@ int on_request_headers(Http2Upstream *upstream, Downstream *downstream,
   if (frame->hd.flags & NGHTTP2_FLAG_END_STREAM) {
     downstream->disable_upstream_rtimer();
 
+    downstream->end_upload_data();
     downstream->set_request_state(Downstream::MSG_COMPLETE);
   }
 

src/shrpx_spdy_upstream.cc

@@ -209,6 +209,7 @@ void on_ctrl_recv_callback(spdylay_session *session, spdylay_frame_type type,
       }
 
       downstream->disable_upstream_rtimer();
+      downstream->end_upload_data();
       downstream->set_request_state(Downstream::MSG_COMPLETE);
     }