Change github.com/scalability-llnl to github.com/llnl everywhere.

bin/spack

bin/spack-python

lib/spack/docs/conf.py

lib/spack/docs/exts/sphinxcontrib/__init__.py

lib/spack/docs/exts/sphinxcontrib/programoutput.py

lib/spack/docs/getting_started.rst

lib/spack/docs/index.rst

lib/spack/env/cc

lib/spack/external/__init__.py

lib/spack/llnl/util/filesystem.py

lib/spack/llnl/util/lang.py

lib/spack/llnl/util/link_tree.py

lib/spack/llnl/util/lock.py

lib/spack/llnl/util/tty/__init__.py

lib/spack/llnl/util/tty/colify.py

lib/spack/llnl/util/tty/color.py

lib/spack/llnl/util/tty/log.py

lib/spack/spack/__init__.py

lib/spack/spack/architecture.py

lib/spack/spack/cmd/__init__.py