uclibc: run snapshot and ng configs through "savedefconfig"

Recently uClibc got support of "savedefconfig" target that allows
generation of compact configuration description which only lists
differences from default options.

That's uClibc commit -
http://git.uclibc.org/uClibc/commit/?id=e286a674419d31cb0757dd2f8307d8b4756cf1f9



This change represents post-processing of "uClibc-snapshot.defconfig"
and "uClibc-ng.config" with "make savedefconfig" made on current
uClibc/master and uClibc-ng/1.0 branches accordingly.

Unfortunately the most recent stable uClibc version 0.9.33.2 doesn't
have "savedefconfig" target so I'm leaving uClibc-0.9.33.config as it
is.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Gustavo Zacarias <gustavo@zacarias.com.ar>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>