53 x 20130801 sherpa2beta2

Addition of autotools as a runtime needed tool (for sherpa gridpack preparation). 
Fixes in relocation of libraries and order of m4 (courtesy of S. Muzaffar). 
Correction to the openmpi-toolfile exported library list. 
Exclusion of sherpampi and openmpi (and respective toolfiles) from the regular CMSSW build, leaving them as adds on spec available for a build on demand, as previously discussed with G. Eulisse. 
To be used for a 5_3_12 based test build. autotools addition and sherpa usage of it not only at build time must be forward propagated (at least in 70X) when the build is validated.