sun.util.resources.en and sun.text.resources.en has been split between rt.jar and localedata.jar. It's not clear that this can work at runtime and is going to be highly problematic when we move to Jigsaw/modules.

With this change, rt.jar would contain all the supported English locales in java.text and java.util packages (cf. http://www.oracle.com/technetwork/java/javase/javase7locales-334809.html#util-text), whereas US English is the only supported locale at the moment w/o localedata.jar.