hg: jdk9/sandbox: Detect memory and cores on bsd systems.

[magnus.ihse.bursie at oracle.com]

Changeset: c3f72731b85e
Author:    ihse
Date:      2015-10-25 22:44 +0100
URL:       http://hg.openjdk.java.net/jdk9/sandbox/rev/c3f72731b85e

Detect memory and cores on bsd systems.

! common/autoconf/build-performance.m4
! common/autoconf/generated-configure.sh