uclibc: update to latest release 1.0.1

Changes are here http://uclibc-ng.org/pipermail/devel/2015-March/000114.html



Buildroot related are SPARC and XTENSA non-threading builds
and static linking fixes for pthread apps like cdrkit.
Add a hotfix for MIPS compile with older GCC.

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