ada_val_print_1: Add language parameter

ada_val_print_1: Add language parameter

This is to help calling val_print.  We would like to be more systematic
in calling val_print when printing, because it allows us to make sure
we take advantage of the standard features such as pretty-printing
which are handled by val_print.

gdb/ChangeLog:

        * ada-valprint.c (ada_val_print_1): Add parameter "language".
        Update calls to self accordingly.  Replace calls to c_val_print
        by calls to val_print.