RFR : [jdk11] 8259786: initialize last parameter of getpwuid_r

[Baesken, Matthias]

Hi, please  review the jdk11 backport of

8259786<https://bugs.openjdk.java.net/browse/JDK-8259786>: initialize last parameter of getpwuid_r

The jdk11 version is similar to jdk/jdk ,  but    instead of changing  perfMemory_posix.cpp  ,  the  separate OS/platform related files have to be changed .




Jdk11 backport  webrev :

http://cr.openjdk.java.net/~mbaesken/webrevs/8259786_0_jdk11/


Bug  /  jdk   link :

https://bugs.openjdk.java.net/browse/JDK-8259786

https://git.openjdk.java.net/jdk/commit/52ed2aab



Thanks, Matthias