* gdb.c++/classes.exp: Accept 'A const' or 'const A' in copy
constructors.
* gdb.c++/derivation.exp: Likewise.
* gdb.c++/templates.exp: Likewise.
* gdb.c++/virtfunc.exp: Likewise.
gdb.c++/inherit.exp, gdb.c++/method.exp,
gdb.c++/namespace.exp, gdb.c++/templates.exp,
gdb.c++/userdef.exp, gdb.c++/virtfunc.exp: Updates for v3 demangler
and class layout support.
* gdb.c++/virtfunc.exp: Replace "const &" with "const ?&",
making the whitespace optional. Also replace "(void) with
"((void|)), making the keyword "void" optional.
* gdb.c++/classes.exp (do_tests): Change runto statements
from "runto 'foo(void)'" to "runto 'foo'". This makes the
statements demangler agnostic.
* gdb.c++/virtfunc.exp (do_tests): Likewise.
(gdb_virtfunc_restart): Likewise.