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