Restore building of common-standalone lib for updater.

Tag #145

toolkit/moz.build

@@ -30,6 +30,14 @@ else:
 if CONFIG['MOZ_UPDATER'] and CONFIG['MOZ_WIDGET_TOOLKIT'] != 'android':
     DIRS += ['mozapps/update']
 
+if CONFIG['MOZ_UPDATER'] and CONFIG['MOZ_WIDGET_TOOLKIT'] == 'windows':
+# Including mozapps/update/common-standalone allows the maintenance service
+# to be built so the maintenance service can be used for things other than
+# updating applications.
+    DIRS += [
+        'mozapps/update/common-standalone',
+    ]
+
 DIRS += ['xre']
 
 if CONFIG['MOZ_WIDGET_TOOLKIT'] in ('gtk2', 'gtk3'):

toolkit/mozapps/update/updater/updater-common.build

@@ -33,6 +33,9 @@ if CONFIG['OS_ARCH'] == 'WINNT':
     LOCAL_INCLUDES += [
         '/toolkit/xre',
     ]
+    USE_LIBS += [
+        'updatecommon-standalone',
+    ]
     OS_LIBS += [
         'comctl32',
         'ws2_32',