class.c (gfc_build_class_symbol): Append "_t" to target class names to make the generated type names unique.

gcc:
2014-04-10  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        * fortran/class.c (gfc_build_class_symbol): Append "_t" to target class
        names to make the generated type names unique.

testsuite:
2014-04-10  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        * gfortran.dg/class_nameclash.f90: New test.

From-SVN: r209277