Implement setStandardInputFile() in ProcessLauncherImpl

Change-Id: I4d77c86ecb750573ce5421ca7300eb27f9f76108
Reviewed-by: hjk <hjk@qt.io>

src/libs/utils/launchersocket.cpp

@@ -326,6 +326,7 @@ void LauncherHandle::doStart()
     p.workingDir = m_workingDirectory;
     p.openMode = m_openMode;
     p.channelMode = m_channelMode;
+    p.standardInputFile = m_standardInputFile;
     sendPacket(p);
 }