testsuite:

PR fortran/15051
* gfortran.fortran-torture/compile/empty_interface_1.f90: New
test.

fortran:

        PR fortran/15051
* parse.c (parse_interface): Allow empty INTERFACE, remove
        seen_body.

Also added ChangeLog entry missing from previous commit, removed umlaut from ChangeLog, and fixed previous entry to use tabs.

From-SVN: r81841