Compiling varnish with jemalloc on s390x

[Ingvar Hagelund]

I recently fixed jemalloc for s390x, so that varnish builds for the
s390x (secondary) Fedora arch. The s390 is very similar to the s390x
(think i386sx vs i386 ;-)

The patch is very simple, and available for example here:
http://cvs.fedora.redhat.com/viewvc/rpms/varnish/devel/varnish.s390x_pagesize.patch?view=markup

With that patch, varnish with jemalloc, both 2.0.3 and 2.0.4 tested,
runs the test suite without errors on s390x.

I have asked Jason Evans to review the patch, but since it's quite
trivial, I guess it's OK.

I think this is a better way to fix Debian's bug #503381.
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=503381

Ingvar