ANDROID: fips140: add jitterentropy to fips140 module

Although jitterentropy doesn't necessarily need to be part of
fips140.ko, it does need to have the SP800-90B health tests enabled, and
that requires that it be compiled with the fips_enabled flag set.  The
easiest way to do this is just to include a copy of it in fips140.ko.

Bug: 153614920
Bug: 188620248
Change-Id: I9dc0281e07e08e0650e3d340897c697722ad3b1a
Signed-off-by: Eric Biggers <ebiggers@google.com>