95fbb94326
build can break when different source files create the same target files (case-insensitivity speaking). This is the case for object files compiled with -fpic and shared libraries. The former uses an extension of ".So", and the latter an extension ".so". Rename shared object files from *.So to *.pico to match what NetBSD does. Missed in r306297 MFC after: 1 month Sponsored by: Bracket Computing Differential Revision: https://reviews.freebsd.org/D7906