Boost GCC requirement

[Jason Bacon <jwbacon%tds.net@localhost>]

I'm wondering how the GCC 4.5 requirement was determined for the latest 
boost pkg.
I'm guessing it came from here:

http://www.boost.org/doc/libs/1_55_0/libs/log/doc/html/log/installation.html

This page indicates that it was tested with GCC 4.5, but may work with 
older compilers.  In fact, it seems to work fine with GCC 4.4.7, which 
is the default compiler for CentOS 6.5.
Since the GCC 4.5 pkg does not build on CentOS 6.5, this requirement 
prevents boost from building as well.  I changed the requirement in 
meta-pkgs/boost/Makefile.common to the following as a work-around:
# GCC 4.5 or later is required to build, and GCC 4.5 is not provided for 
OpenBSD
.if ${OPSYS} == "OpenBSD"
GCC_REQD+=        4.6
.elif ${OPSYS} == "Linux"
GCC_REQD+=        4.4
.else
GCC_REQD+=        4.5
.endif

Any objections to importing this change or a similar one?

Regards,

    Jason