add support to gcc for AES and PCLMUL intrinsics...  This addes the
-maes option, but not the -mpclmul option as I ran out of bits in
the 32 bit flags field...  You can -D__PCLMUL__ to get this, but it
won't be compatible w/ clang and modern gcc...

Reviewed by:	-current, -toolchain
Follow clang lead and include  mm_malloc.h only in hosted configurations.

This makes the use of intrinsics easier in kernel environment, according
to the submitter.

Requested by: jmg