RFR: 8221532: Incorrect copyright header in FileSystemSupport_md.c

[Daniil Titov]

Please review a trivial change that fixes the copyright headers in two files.

Webrev: http://cr.openjdk.java.net/~dtitov/8221532/webrev.01
Bug: https://bugs.openjdk.java.net/browse/JDK-8221532 

Thanks!
--Daniil