ports/156253: [patch] Update devel/boost-* from 1.45 to 1.46.1

[Alexander Churanov]

Folks,

Let's try updating boost ports using this patch:
http://alexanderchuranov.com/boost-port/boost-145-to-148-v06.diff

As I know at present most dependent ports are either OK with newer
boost or have fixes by maintainers. In some cases it was suggested to
not pay any attention to failures (e.g. for libre office).

For this patch I've verified everything that I was able to.
Unfortunately it's not building every dependent package on every
supported FreeBSD version and architecture. I had hard time even
building direct dependencies on i386 and amd64 for 8.0.

That's why I suggest applying this patch now and fixing critical
issues as soon as they are detected. I am going to prepeare update to
most recent verision of Boost after that - it should be much easier
due to minor verison lag.

Alexander Churanov,
maintainer of devel/boost-*