* powerpc time_t is 64 bit, not 32 bit.
* Add definition for powerpc64le.
With this, powerpc64le ntpd and ntpdate operate correctly instead of
corrupting the clock and exiting.
Tested on powerpc64, powerpc64le, and powerpc.
No feedback from cy@.
I am a bit confused as to how SIZEOF_TIME_T being wrong ever worked on
powerpc, it being big endian and all.
Sponsored by: Tag1 Consulting, Inc.
Differential Revision: https://reviews.freebsd.org/D26379
ab2032371e