RFR(XS): 8008255: jvmtiExport.cpp::post_to_env() does not check malloc() return

[Rickard Bäckman]

Hi,

please review this small change.
The change adds a check to see the result of a malloc() and aborts the VM with 
an out of memory error. 

Webrev: http://cr.openjdk.java.net/~rbackman/8008255/
Bug: http://bugs.sun.com/view_bug.do?bug_id=8008255

Thanks
/R