Replace QtcProcess::stopProcess() by stop() plus waitForFinished

... or nothing, if the process object is destroyed immediately.

Change-Id: I6a1e1928bc49fc20a1c0e0ee9b8f4f723276bbca
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>

src/plugins/android/androidqmlpreviewworker.cpp

@@ -363,7 +363,8 @@ FilePath AndroidQmlPreviewWorker::createQmlrcFile(const FilePath &workFolder,
         QByteArray stdOut;
         QByteArray stdErr;
         if (!rccProcess.readDataFromProcess(30, &stdOut, &stdErr, true)) {
-            rccProcess.stopProcess();
+            rccProcess.stop();
+            rccProcess.waitForFinished();
             appendMessage(tr("A timeout occurred running \"%1\"").
                           arg(rccProcess.commandLine().toUserOutput()), StdErrFormat);
             qrcPath.removeFile();