[Midnightbsd-cvs] mports: bsd.port.subdir.mk: Cache and pass some information to sub makes

[laffer1 at midnightbsd.org]

Log Message:
-----------
Cache and pass some information to sub makes to improve performance.

add HAVE_COMPAT_IA32_KERN  for amd64 arch so we know we can use IA32

Modified Files:
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    mports/Mk:
        bsd.port.subdir.mk (r1.16 -> r1.17)
        (http://cvsweb.midnightbsd.org/mports/Mk/bsd.port.subdir.mk?r1=1.16&r2=1.17)