RFR: 8214944: replace strerror by os::strerror

[Baesken, Matthias]

Hello  , please review this small fix .

Hotspot still has a few uses of the thread unsafe strerror function.
Most places where strerror has been used previously, were already replaced by os::strerror  (using a errno_to_string error text array).

But a few places remained and should also use better use  os:strerror.


Bug/webrev :

https://bugs.openjdk.java.net/browse/JDK-8214944

http://cr.openjdk.java.net/~mbaesken/webrevs/8214944.0/


Thanks, Matthias