Comment 15 for bug 1762928

ppc64el versions of the Xenial test kernel are now available here:

 http://kernel.ubuntu.com/~jsalisbury/lp1762928/xenial

Xenial required the following two prereq commits:
d96f234f47af ("powerpc: Avoid load hit store in setup_sigcontext()")
d11994314b2b ("powerpc: signals: Stop using current in signal code")