Update to 2.12.1

• Add NO_ARCH=yes

Changes: http://scala-lang.org/news/2.12.1
PR: 215492
Submitted by: Jens Grassel <jan0sch@mykolab.com>
Approved by: lme (mentor), mitsururike@gmail.com (maintainer timeout, ~4 months)
Differential Revision: https://reviews.freebsd.org/D10411