8202794: Native Unix code should use readdir rather than readdir_r

[Brian Burkhalter]

https://bugs.openjdk.java.net/browse/JDK-8202794

Continues thread [1] with subject line updated to match the issue summary. Part of this general problem was addressed in [2].

The patch is in effect that proposed in thread [1] less the changes in [2]:

http://cr.openjdk.java.net/~bpb/8202794/webrev.00/

Thanks to Bernard Blaser for the patch.

There were no build errors on Linux, macOS, nor Solaris, nor in the usual set of regression tests on these platforms.

Thanks,

Brian

[1] http://mail.openjdk.java.net/pipermail/core-libs-dev/2018-May/052991.html
[2] http://mail.openjdk.java.net/pipermail/nio-dev/2018-July/005325.html