Our fortran tests were not very good. All the libraries created

Our fortran tests were not very good. All the libraries created
were convenience libs, so we did not test the creation of shared
libraries on any platform. Also none of the libs used any actual
fortran library calls, adding a call to write(*,*) in each lib
causes the tests to fail on darwin (and presumably other platforms).
These new tests would likely cause many more fortran test failures,
so if there is an error during make it is reported as SKIP.

* tests/f77demo-make.test: Don't fail hard, skip on failure.
* tests/f77demo/foof2.f: New file.
* tests/f77demo/foof3.f: New file.
* tests/f77demo/fprogram.f: Call routine in new lib.
* tests/f77demo/foof.f: Call routine in another new lib.
* tests/f77demo/Makefile.am: Make a couple of new libraries, add
$(FLIBS) to cprogram LDADD.