package/uclibc: add upstream patch to fix Thumb2 builds

package/uclibc: add upstream patch to fix Thumb2 builds

When uClibc-ng 1.0.17 was released, there was a regression when building
Thumb2-only for a CPU that is capable of running in arm mode (e.g. an
armv7a cpu).

We hastily added a patch to revert the upstream commit, as a stop-gap
measure, waiting for the actual fix.

That actual fix is there, now. :-)

Drop our revert-patch, and add the upstream patch.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>