Request for review: https://jbs.oracle.com/bugs/browse/JDK-8017473

[Joseph Provino]

Bug report: https://jbs.oracle.com/bugs/browse/JDK-8017473

This is for SE_8 but will be backported to 7u.

Webrev: http://cr.openjdk.java.net/~jprovino/8017473/webrev.00/ 
<http://cr.openjdk.java.net/%7Ejprovino/8017473/webrev.00/>

I changed PLATFORM_NMT_DETAIL_SUPPORTED to 
PLATFORM_NATIVE_STACK_WALKING_SUPPORTED
to make the name more general.

Added -DPLATFORM_NMT_DETAIL_SUPPORTED=1 to linux/makefiles/debug.make 
because
with the low optimization for debug builds, -fno-omit-frame-pointer is 
set and stack walking
is always permissible.

Changed vm.make to optionally include an architecture specific makefile 
in case some files
need to be compiled with special options such as -fno-omit-frame-pointer.

Thanks.

joe