Update dggsvd support in Epetra
Created by: jwillenbring
CC: @bartlettroscoe @maherou
dggsvd was deprecated in LAPACK 3.6.0. In the same version, dggsvd3 was added, which has one fewer argument but is similar otherwise.
ftp://ftp.icm.edu.pl/packages/netlib/lapack/lapack-3.6.0.txt http://www.netlib.org/lapack/explore-html/d6/db3/dggsvd3_8f.html http://www.netlib.org/lapack/explore-html/dd/db4/dggsvd_8f.html
@bartlettroscoe suggested that a configure-time check would be appropriate here to probe LAPACK and see which routine is available. There are examples of this sort of thing in Teuchos (see Trilinos/packages/teuchos/CMakelists.txt).
@krcb is this something @MicheldeMessieres or you could take a look at?