devel/binutils: add /usr/lib32 to search path

Merge upstream commit f026d7063ece:

    Add /usr/lib32 to the native search paths for FreeBSD systems.

PR:		280447
Approved by:	cy (maintainer)
Upstream PR:	https://sourceware.org/bugzilla/show_bug.cgi?id=31395
MFH:		2024Q3
Sponsored by:	DARPA, AFRL

(cherry picked from commit e85c5176)