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.
gdb/ChangeLog:
* parse.c (parse_exp_in_context): When block is not NULL, use
its associated language to parse the expression instead of
the current_language.
gdb/testsuite/ChangeLog:
* gdb.ada/cond_lang: New testcase.
