OCaml ppc64 support

[Richard W.M. Jones]

I finally managed to get a small(-ish) reproducer for the large entry
function bug.  Well, just over 1000 lines of code :-)

https://bugzilla.redhat.com/show_bug.cgi?id=826649#c5

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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