Incorrect copyright header in FileSystemSupport_md.c

The following file has an incorrect header format:

src/java.instrument/unix/native/libinstrument/FileSystemSupport_md.c
src/java.instrument/windows/native/libinstrument/FileSystemSupport_md.c

You were assigned this bug since you were the last active developer to edit this file.

You can verify the header is correct with make/scripts/lic_check.sh (from JDK 10 WS) to make sure each file now passes.

The template is located at:
  make/templates/gpl-header
  make/templates/gpl-cp-header

 * Copyright (c) 2004, 2018 Oracle and/or its affiliates. All rights reserved.

Missing comma after second year, YEAR should be "2018,"

%YEARS% should be one of two formats

    "YEAR,"
    "YEAR, YEAR,"