RemoteLinux: Fix RsyncDeployService::setDeployableFiles()

It previously did not set, but appended.

Amends 515845b815.

Cherry-picked from bf57568880

Change-Id: Ida3bd66e188ad4b1bbf0ea7686ac101a3f61c28e
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>

src/plugins/remotelinux/rsyncdeploystep.cpp

@@ -110,6 +110,7 @@ private:
 
 void RsyncDeployService::setDeployableFiles(const QList<DeployableFile> &files)
 {
+    m_files.clear();
     for (const DeployableFile &f : files)
         m_files.append({f.localFilePath(), deviceConfiguration()->filePath(f.remoteFilePath())});
 }