* gdb.base/finish.exp: Accept '1' instead of \001 from char_func. Add a RE to accept a non-ascii char if one is ever presented.
* gdb.base/finish.exp: New test for gdb's "finish" command. * gdb.base/return2.exp: New test for gdb's "return" command. * gdb.base/return2.c: New source file for above.