Fix error after rebased on the latest master

- bug887483
  remove FORCE_STATIC_LIB=1
- remove nsIDOMNavigatorFMRadio.idl
  Navigator won't implement this idl any more.
- Specify navigator.mozFMRadio in Navigator.webidl
- Changed the IPC function names in ContentChild, ContentParent,
  FMRadioParent and FMRadioChild
- bug897484
  GC: Convert JS_GetProperty APIs to take MutableHandleValue