message: updating branch on manylinux build script
diff: #!/bin/bash
  export rpath_python=/opt/_internal/cpython-3.6.4/bin/python
  -git clone --recursive -b mccaskey/cpr_build https://github.com/eclipse/xacc
  +git clone --recursive https://github.com/eclipse/xacc
  cd xacc
  for version in cp36-cp36m cp35-cp35m cp34-cp34m cp33-cp33m cp27-cp27m cp27-cp27mu
  