VCS[Mercurial]: Working directory not set for asynchronous commands.

Manually fix breakage introduced by merge conflicts.

Task-number: QTCREATORBUG-1503

src/plugins/mercurial/mercurialjobrunner.cpp

@@ -193,6 +193,7 @@ void MercurialJobRunner::task(const QSharedPointer<HgTask> &job)
         qDebug() << Q_FUNC_INFO << "Repository root is " << taskData->repositoryRoot();
 
     QProcess hgProcess;
+    hgProcess.setWorkingDirectory(taskData->repositoryRoot());
     hgProcess.start(binary, args);
 
     if (!hgProcess.waitForStarted()) {