uclibc-ng: bump version from 1.0.6 to 1.0.8

2 new architectures were added in between 1.0.6 and 1.0.8 in uClibc-ng,
these are:
 * lm32
 * or1k

Even thought both are not yet supported in OpenWRT it's important to
disable them both in default config file otherwise user prompt will
appear during uClibc configuration asking to select desired
architecture.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Waldemar Brodkorb <wbx@uclibc-ng.org>
Cc: Mathieu Olivari <mathieu@codeaurora.org>
Cc: Felix Fietkau <nbd@openwrt.org>
Cc: John Crispin <blogic@openwrt.org>

SVN-Revision: 47356