uclibc-ng: update to 1.0.2

Following problems found by buildroot should be fixed:
 * static python2 compile (there is still a general problem, not related to uClibc-ng)
 * postgresql configure hickup (link warnings got removed)
 * samba runtime problems (RPATH in executables are respected)

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>