Bump OpenBLAS to v0.2.13

should fix #9084, and gets rid of a patch that was upstreamed
Allow OPENBLAS_SYMBOLSUFFIX to be overridden in Make.user

currently the only values that will make much sense are "64_" or ""
due to arpack and suitesparse
Merge pull request #9277 from JuliaLang/tk/openblas-0.2.13

RFC: Bump OpenBLAS to v0.2.13