math/adept: Update to 2.0.5

The chenge log wasn't published, but one major reason
was the fix of SIMD instruction failures on some
i386 FreeBSD architectures reported here:
https://github.com/rjhogan/Adept-2/issues/7

Submitted by: myself
Reported by: portscout
Approved by: tcberner (mentor)
Differential Revision: https://reviews.freebsd.org/D14238