superbuild: bump for python-2.7.15 and numpy-1.15.1
Also comes with some other changes not relevant to ParaView's superbuild.
Cc: @utkarsh.ayachit @cory.quammen
Backport: release
Edited by Ben Boeckel
Also comes with some other changes not relevant to ParaView's superbuild.
Cc: @utkarsh.ayachit @cory.quammen
Backport: release