Maemo: Set more restrictive permissions for generated private keys.

For better compatibility with the OpenSSH client.

src/plugins/qt4projectmanager/qt-maemo/maemodeviceconfigwizard.cpp

@@ -415,6 +415,8 @@ private:
             enableInput();
             return;
         }
+        QFile::setPermissions(privateKeyFilePath(),
+            QFile::ReadOwner | QFile::WriteOwner);
 
         m_ui->statusLabel->setText(m_ui->statusLabel->text() + tr("Done."));
         m_isComplete = true;

src/plugins/qt4projectmanager/qt-maemo/maemosshconfigdialog.cpp

@@ -131,4 +131,6 @@ void MaemoSshConfigDialog::saveKey(bool publicKey)
             : m_keyGenerator->privateKey());
     if (saver.finalize(this) && !publicKey)
         emit privateKeyGenerated(fileName);
+    if (!publicKey)
+        QFile::setPermissions(fileName, QFile::ReadOwner | QFile::WriteOwner);
 }