of "646" as the charset of the C/POSIX locale: This removes the
patches to libiconv's internal hash tables and adds US-ASCII to
config.charset, for the benefit of whatever GNU code uses this--
libiconv itself has "US-ASCII" built in.
The "INSTALL_DATA=cp" override has also been obsolete since we
started running the fake install as non-root.
ok Brad
1f28cd8f1b