Updated devel/cpuflags to 1.24

Add map_x86_brand_string to subr_x86 and use in NetBSD,
Linux and Solaris to determine ARCH for Intel CPUs after PIII.
(Still need to rework AMD CPU detection to use family and
extended family)
Added 'AMD K6-2 (586-class)' - thanks Brian Ginsbach
Added 'Pentium(R) Dual-Core  CPU      E5200' - thanks Andreas Burghardt

(abs)