For whatever reason, Lustre's spec file deletes all .la files that it finds in the %{_libdir} path. On RHEL7 in some environments, again for unknown reasons, there don't seem to be any .la files in the first place. Which is apparently what we wanted, but the .la remove line thows an error if it can't find and .la files and breaks the packaging process.

We can pretty safely just ignore error code from that cleanup line for now. In the future, maybe we can remove the line altogether.