ltp-testsuite: update to latest, fix uClibc-ng issues

ltp-testsuite: update to latest, fix uClibc-ng issues

Update to latest ltp-testsuite release, which resolves sparc64/sparc
autobuild failures:
http://autobuild.buildroot.net/results/a6445df26514dfa9cd7e5b9d34b4687d46a8d19b/

Furthermore it should fix any other uClibc-ng related issues.
0001-fix-build-on-uClibc-exp10.patch removed, as uClibc-ng 1.0.12
contains exp10() implementation.
0001-fix-uClibc-build.patch suggested upstream.

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