- rpmbf: add -lm to pickup log(3) and pow(3).
- rpmbf: add -lm to pickup log(3) and pow(3).

devzero2000/RPM5,devzero2000/RPM5,devzero2000/RPM5,devzero2000/RPM5,devzero2000/RPM5,devzero2000/RPM5,devzero2000/RPM5