uefi: Add a translatable string for future use

This is added now so the translator teams get a chance to translate it before
it is used in anger.

plugins/uefi/fu-plugin-uefi.c

@@ -24,6 +24,7 @@
 #include <appstream-glib.h>
 #include <fwup.h>
 #include <fcntl.h>
+#include <glib/gi18n.h>
 
 #include "fu-quirks.h"
 #include "fu-plugin.h"
@@ -180,6 +181,7 @@ fu_plugin_update_offline (FuPlugin *plugin,
 	guint64 hardware_instance = 0;	/* FIXME */
 	int rc;
 	g_autoptr(fwup_resource_iter) iter = NULL;
+	const gchar *str;
 
 	/* get the hardware we're referencing */
 	fwup_resource_iter_create (&iter);
@@ -187,6 +189,10 @@ fu_plugin_update_offline (FuPlugin *plugin,
 	if (re == NULL)
 		return FALSE;
 
+	/* TRANSLATORS: this is shown when updating the firmware after the reboot */
+	str = _("Installing firmware update…");
+	g_assert (str != NULL);
+
 	/* perform the update */
 	g_debug ("Performing UEFI capsule update");
 	fu_plugin_set_status (plugin, FWUPD_STATUS_SCHEDULING);

po/POTFILES.in

 policy/org.freedesktop.fwupd.policy.in
 libdfu/dfu-tool.c
 plugins/synapticsmst/synapticsmst-tool.c
+plugins/uefi/fu-plugin-uefi.c
 src/fu-debug.c
 src/fu-main.c
 src/fu-util.c