Fix building for x32 target
* mpi/amd64/mpi-asm-defs.h: New file. * random/rndhw.c (poll_padlock) [__x86_64__]: Also check if __LP64__ is defined. [USE_DRNG, __x86_64__]: Also check if __LP64__ is defined.
In short, x32 is new x86-64 ABI with 32-bit pointers. Adding support is
straightforward, small fix for mpi and fixes for random/rndhw.c. AMD64 assembly
functions appear to work fine with x32 and 'make check' passes.
- Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>