ShellCommand: Pass OutputProxy to runFullySynchronous

No need to create a fresh one.

Change-Id: I3c7b92319ab43030620428987dfa254be7ac03a7
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

src/libs/utils/shellcommand.h

@@ -163,6 +163,7 @@ protected:
 private:
     void run(QFutureInterface<void> &future);
     SynchronousProcessResponse runFullySynchronous(const FileName &binary, const QStringList &arguments,
+                                                   OutputProxy *proxy,
                                                    int timeoutS, const QString &workingDirectory,
                                                    const ExitCodeInterpreter &interpreter = defaultExitCodeInterpreter);