freebsd32: add feed foward clock syscalls

freebsd32: add feed foward clock syscalls

These are required when supporting i386 because time_t is 32-bit which
reduces struct bintime to 12-bytes when combined with the fact that 64-bit
integers only requiring 32-bit alignment on i386.  Reusing the default
ABI version resulted in 4-byte overreads or overwrites to userspace.

Reviewed by:	kevans