There is a typo in the audiofile-0.1.9-3 spec file's %install section. The second strip command omits the $RPM_BUILD_ROOT variable and thus executes "strip /usr/lib/*.so.*". It should read "strip $RPM_BUILD_ROOT%{prefix}/lib/*.so*"
This is fixed in audiofile-0.1.9-5 (which is in Pinstripe - Public beta)