Log Message:
Changes 3.3.3:
* Fix deadlock bug in MPI transforms (thanks to Michael Pippig for the
  bug report and patch, and to Graham Dennis for the bug report).
* Use 128-bit ARM NEON instructions instead of 64-bits.  This change
  appears to speed up even ARM processors with a 64-bit NEON pipe.
* Speed improvements for single-precision AVX.
* Speed up planner on machines without "official" cycle counters, such \ 
as ARM.