8169373: Work around linux NPTL stack guard error.
Summary: Also skip libc guard page for compiler thread, merge similar code on linux platforms, and streamline libc guard page handling on linuxs390, linuxppc, aixppc.
Reviewed-by: dholmes, dcubed, kvn
syntax: glob
build/*
dist/*
/nbproject/private/
private.xml
private.properties
^webrev
.classpath
*.class
*.clazz
*.log
*.orig
*.rej
*~
genfiles.properties
hotspot.log
.DS_Store*
TEST-*.xml
TESTS-*.xml
report.xml
CC/*
jcov2/*
.idea/*
test/lib/*.jar
test/script/external/*
.project
.externalToolBuilders/*
.settings/*
NashornProfile.txt