Fix a regression in _find_library.
Fix a regression in _find_library.

seanjensengrey/pyMIC,mjklemm/pyMIC,FreddieWitherden/pyMIC,01org/pyMIC,mjklemm/pyMIC,mjklemm/pyMIC,SuperBo/pyMIC,SuperBo/pyMIC,seanjensengrey/pyMIC,01org/pyMIC,SuperBo/pyMIC,seanjensengrey/pyMIC,FreddieWitherden/pyMIC,SuperBo/pyMIC,01org/pyMIC,FreddieWitherden/pyMIC,FreddieWitherden/pyMIC,pombreda/pyMIC,01org/pyMIC,mjklemm/pyMIC,pombreda/pyMIC,pombreda/pyMIC,seanjensengrey/pyMIC,pombreda/pyMIC