Log Message:
coyim: make some progress on build on NetBSD

Dies with
# github.com/coyim/coyim
/usr/pkg/go121/pkg/tool/netbsd_amd64/link: running gcc failed: exit status 4
ld: /usr/lib/libm.so.0: warning: warning: reference to compatibility cabs()
ld: /usr/lib/libm.so.0: warning: warning: reference to compatibility cabsf()
ld: /tmp/go-link-3199807246/go.o: warning: relocation in read-only section \ 
`.gopclntab'
ld: BFD (NetBSD Binutils nb1) 2.39 assertion fail \ 
/usr/src/external/gpl3/binutils/lib/libbfd/../../dist/bfd/reloc.c:8560
/tmp/go-link-3199807246/000000.o:(.rsrc+0x100): dangerous relocation: gcc: \ 
internal compiler error: Segmentation fault signal terminated program ld
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://www.NetBSD.org/support/send-pr.html> for instructions.