Fastlinearalgebra.update libraries.proposal

contains a cherry-pick from Dan
( https://github.com/jakobkroeker/M2/commit/52db5423a3034a2ace98aa8f3e4a9c7dfe404e01 )
to fix default blas detection  failing on Fedora and SL (due to missing -lgortran flag) 

,a mpfr backward compatibility ( no definition of clears() in older versions; )

and a removal of the static keyword for CharPoly()