Save name of device-controller-plugin (either libCAmaster or libCAslave)

in the Update-object.

update.h

@@ -27,6 +27,7 @@ class Update : public QObject {
     QString m_customerRepository;
     QString m_customerNrStr;
     QString m_branchName;
+    QString m_pluginName;
     QString m_workingDir;
     bool m_maintenanceMode;
     bool m_dryRun;
@@ -44,6 +45,7 @@ public:
                     QString customerRepository,
                     QString customerNrStr,
                     QString branchName,
+                    QString pluginName,
                     QString workingDir,
                     bool dryRun = false,
                     QObject *parent = nullptr,