hg: shenandoah/jdk8u/hotspot: Fix linkage error on i586, incrementq and addq are not implemented.

[ashipile at redhat.com]

Changeset: 97f3b9319f44
Author:    shade
Date:      2017-03-20 21:06 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/97f3b9319f44

Fix linkage error on i586, incrementq and addq are not implemented.

! src/cpu/x86/vm/macroAssembler_x86.cpp
! src/cpu/x86/vm/shenandoahBarrierSet_x86.cpp