There is a minor update to mtl. Since this is port only
consists of header, and no library is actually build I
followed their recomendation and added NO_BUILD which saves
some time doing unnecessary testing.
I also wanted to add LAPACK support but I couldn't. At least
I fixed a bug in configure in the process.
PR: ports/55203
Submitted by: Pedro F. Giffuni <giffunip@yahoo.com>