hg: jdk/submit: 8197429: Increased stack guard causes segfaults on x86-32

[aph at redhat.com]

Changeset: 7fa157176a0f
Author:    aph
Date:      2018-02-19 18:38 +0000
URL:       http://hg.openjdk.java.net/jdk/submit/rev/7fa157176a0f

8197429: Increased stack guard causes segfaults on x86-32
Reviewed-by: dholmes

! make/test/JtregNativeHotspot.gmk
! src/hotspot/os/linux/os_linux.cpp
! src/hotspot/os/linux/os_linux.hpp
! src/hotspot/os_cpu/linux_x86/os_linux_x86.cpp
+ test/hotspot/jtreg/runtime/StackGap/T.java
+ test/hotspot/jtreg/runtime/StackGap/exestack-gap.c
+ test/hotspot/jtreg/runtime/StackGap/testme.sh