jemalloc-4.0.0 test suite segfaults on aarch64

[Jason Evans]

On Aug 19, 2015, at 11:15 PM, Ingvar Hagelund <ingvar at redpill-linpro.com> wrote:
> Note that gcc still warns about "right shift count is negative".
> 
> http://arm.koji.fedoraproject.org//work/tasks/9259/3129259/build.log

Bummer.  I tested this with clang, which does enough flow control analysis to realize that the negative shifts are unreachable and omit the warnings, but then forgot to check gcc.  I'll revert to #if..#elseif..#else..#endif.

Thanks,
Jason