runhprof not working in JDK7 builds

[Charles Oliver Nutter]

Hello friends and Henri Gomez!

I have just learned that another user building OpenJDK on Linux sees
the same runhprof error I do when I run on OS X. Basically, if you try
to -Xrunhprof, you get this:

HPROF ERROR: Unknown constant
[../../../src/share/demo/jvmti/java_crw_demo/java_crw_demo.c:693]
[hprof_init.c:210]
HPROF TERMINATED PROCESS

What's the dilly-o? I needs me my runhprof!

- Charlie