fork1() is exported from the hotspot for AIX, Linux and BSD, and for Linux, fork1() is defined as well (a simple alias for fork()). No-one really seems to know why we do this. The function does not get used.

See discussion here: http://mail.openjdk.java.net/pipermail/hotspot-runtime-dev/2015-October/016098.html So, lets remove those fork1() remnants from Non-Solaris platforms.