hg: jdk/jdk: 8252248: __SIGRTMAX is not declared in musl libc

[alexander.scherbatiy at bell-sw.com]

Changeset: 888baa56b951
Author:    alexsch
Date:      2020-08-31 11:18 +0300
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/888baa56b951

8252248: __SIGRTMAX is not declared in musl libc
Reviewed-by: alanb, vtewari, stuefe

! src/java.base/linux/native/libnet/linux_close.c
! src/java.base/unix/native/libnio/ch/NativeThread.c