Two modifications:
1. The addition of 2013 to the copyright year range for every file;
2. The use of a single year range, instead of potentially multiple
year ranges, as approved by the FSF.
of subarray and substring variable.
* gdb.fortran/subarray.f: New source file for the test of subarray
and substring variable evaluation.
* gdb.fortran/exprs.exp: Add four tests for substring evaluation
of string constant.
