hg: jdk/submit: 8221639: [x32] expand_exec_shield_cs_limit workaround is undefined code after JDK-8199717

[sgehwolf at redhat.com]

Changeset: 660dbb2c9d0c
Author:    sgehwolf
Date:      2019-04-18 13:58 +0200
URL:       http://hg.openjdk.java.net/jdk/submit/rev/660dbb2c9d0c

8221639: [x32] expand_exec_shield_cs_limit workaround is undefined code after JDK-8199717
Summary: Only perform this optimization for x86_64
Reviewed-by: duke

! src/hotspot/os/linux/os_linux.cpp
! src/hotspot/os_cpu/linux_x86/os_linux_x86.cpp