hg: jdk9/hs-rt/hotspot: 8074312: Enable hotspot builds on 4.x Linux kernels

[david.holmes at oracle.com]

Changeset: 471b684ff43e
Author:    sgehwolf
Date:      2015-03-10 21:20 -0400
URL:       http://hg.openjdk.java.net/jdk9/hs-rt/hotspot/rev/471b684ff43e

8074312: Enable hotspot builds on 4.x Linux kernels
Summary: Add "4" to list of allowable versions
Reviewed-by: dholmes, mikael

! make/linux/Makefile