[aarch64-port-dev ] Request to cherry-pick JDK-8215976, fix gmtime_r declaration conflicts in zip.cpp with linux header files

[Patrick Zhang]

Can I ask for cherry-pick JDK-8215976 from jdk/jdk to aarch64-port, as the problem was originally found in my aarch64 env, and getting it solved here is what I want indeed.
Would there be any proper process to follow, please let me know. Appreciate your help.

(A simple and safe patch)
JBS: https://bugs.openjdk.java.net/browse/JDK-8215976
Changeset: http://hg.openjdk.java.net/jdk/jdk/rev/06862c019f3f
From: jdk/jdk, src/jdk.pack/share/native/common-unpack/zip.cpp
To: aarch64-port/jdk8u-shenandoah/jdk, src/share/native/com/sun/java/util/jar/pack/zip.cpp

Regards
Patrick