bento noticed one subdirectory doesn't build correctly:
- add -traditional-cpp -DUSESTRINGDOTH to CFLAGS
- generic sys_nerr fix
- bump port rev because the build error doesn't break the build, but
just leads to missing files
- checked against -STABLE
PR: ports/47964
Submitted by: Volker Stolz <stolz@fump.kawo2.rwth-aachen.de>