qt5: fix --with-qt with no arguments

qa/rpc-tests/send.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+TIMEOUT=10
+SIGNAL=HUP
+if [ $# -eq 0 ]; then
+  echo -e "Usage:\t$0 <cmd>"
+  echo -e "\tRuns <cmd> and wait ${TIMEOUT} seconds or until SIG${SIGNAL} is received."
+  echo -e "\tReturns: 0 if SIG${SIGNAL} is received, 1 otherwise."
+  exit 0
+fi
+trap '[[ ${PID} ]] && kill ${PID}' ${SIGNAL}
+"$@"
+sleep ${TIMEOUT} & PID=$!
+wait ${PID} && exit 1
+exit 0