base-cbm: Export the lang property on DBus

Signed-off-by: Guido Günther <agx@sigxcpu.org>

introspection/org.freedesktop.ModemManager1.Cbm.xml

@@ -65,5 +65,14 @@
     -->
     <property name="Update" type="u" access="read" />
 
+    <!--
+        Language:
+
+        The language of the CBM as ISO639 two letter code
+
+        Since: 1.26
+    -->
+    <property name="Language" type="s" access="read" />
+
   </interface>
 </node>

src/mm-base-cbm.c

@@ -173,6 +173,7 @@ initialize_cbm (MMBaseCbm *self)
                   "channel",              mm_cbm_part_get_channel (part),
                   "update",               CBM_SERIAL_MESSAGE_CODE_UPDATE (serial),
                   "message-code",         CBM_SERIAL_MESSAGE_CODE (serial),
+                  "language",             mm_cbm_part_get_language (part),
                   NULL);
 }