Enable VSX with HAVE_VSX for double.


git-svn-id: http://qmcpack.googlecode.com/svn@5412 4bc5593c-822e-11de-b41d-d982dfe7be50
Template cmake toolchain file for IBM P7.


git-svn-id: http://qmcpack.googlecode.com/svn@5413 4bc5593c-822e-11de-b41d-d982dfe7be50