Bug 1218027 - "--with-system-icu fails: js/src/jsapi.cpp:69: error: visibility does not match previous declaration". r=mh+mozilla

config/system-headers

@@ -1328,6 +1328,7 @@ xlocale.h
 #ifdef MOZ_SHARED_ICU
 unicode/locid.h
 unicode/numsys.h
+unicode/timezone.h
 unicode/ucal.h
 unicode/uchar.h
 unicode/uclean.h