hg: jdk/sandbox: 8202794: Native Unix code should use readdir rather than readdir_r

[chris.hegarty at oracle.com]

Changeset: c6600aba799b
Author:    bpb
Date:      2018-07-17 12:03 -0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/c6600aba799b

8202794: Native Unix code should use readdir rather than readdir_r
Reviewed-by: alanb, bsrbnd
Contributed-by: Bernard Blaser <bsrbnd at gmail.com>

! src/java.base/unix/native/libjava/TimeZone_md.c
! src/java.base/unix/native/libjava/UnixFileSystem_md.c
! src/jdk.management/unix/native/libmanagement_ext/OperatingSystemImpl.c