Force OpenBLAS to use only one thread to avoid test failures for 32-bit
BLAS on 64-bit architectures.

fix #1804
Update to arpack-ng 3.1.3.
This should fix the depcomp issue on Windows.
Fix a few more arpack filename changes that were missed in the earlier checkin
Revert "reinterpret: scalar reinterpret for Float{32,64} => Uint{32,64}."

This reverts commit eb3fd999b5ebe282715f184016d5546d611f336e.

This functionality already existed; mea culpa.
fix #2733
Merge branch 'master' of github.com:JuliaLang/julia into jb/kwargs
fix function name debug info for hidden keyword arg methods