RFR (S) 7187999: dtrace jstack action is broken

[serguei.spitsyn at oracle.com]

Please, review the fix for:
   https://bugs.openjdk.java.net/browse/JDK-7187999


Open webrev:
http://cr.openjdk.java.net/~sspitsyn/webrevs/2014/hotspot/7187999-dtrace.1


Summary:

   The DTrace jstack action support was broken for several years.
   The issue came when the build flag -Xlazyload was added by request 
from the Solaris team.
   This flag was necessary to resolve a performance issue.
   The jstack action stopped working as the jhelper.d was loaded lazily 
as well.

   The idea of this fix was suggested by Junsang Cho from the Solaris team.
   The jhelper.d and hotspot probes (other USDT scripts) are separated 
into two different SUNW_DOF sections.
   Now the jhelper.d is built without the -Xlazyload flag.

Testing:
   Running the adhoc dtrace tests on Solaris sparcv9 and amd64


Thanks,
Serguei