adjust /lib/ to /%{_lib}/
fixes this error:
```
mv: cannot stat '/builddir/build/BUILDROOT/clang-16.0.0~pre20230122.g6aaac4c144572d-1.fc36.x86_64/usr/lib/libear': No such file or directory
mv: cannot stat '/builddir/build/BUILDROOT/clang-16.0.0~pre20230122.g6aaac4c144572d-1.fc36.x86_64/usr/lib/libscanbuild': No such file or directory
```