[11u] RFR 8233829: javac cannot find non-ASCII module name under non-UTF8 env

[Toshio 5 Nakamura]

Hi,

I'd like to backport 8233829 to 11u.
Original patch does not apply cleanly to 11u, because the target file was
reworked. The logic of the fix is same.

Original bug:
https://bugs.openjdk.java.net/browse/JDK-8233829
https://hg.openjdk.java.net/jdk/jdk/rev/25551ba96f75

11u webrev:
http://cr.openjdk.java.net/~tnakamura/8233829-11u/webrev.00

Testing: tier1 and tier2

Thanks,
Toshio Nakamura