Fix packaging bug in dbus option.
Use fortran77 as language, not fortran.
Fixes blas and lapack builds. Suggested by ryoon.

Bump PKGREVISION and change SVR4_PKGNAME to be different from libtool-base.
Updated devel/libtool-fortran to 2.4.2nb1
Don't treat 'clang' as Visual C++ compiler.