ubi-utils-klibc_1.5.0: remove recipe and patches

Next patch replaces with v. 1.5.1 and new/rebased patchset

Signed-off-by: Andrea Adami <andrea.adami@gmail.com>
ubi-utils-klibc_1.5.1: initial commit of v. 1.5.1

NOTE: we track master upstream so we are some commits ahead v 1.5.1.

Signed-off-by: Andrea Adami <andrea.adami@gmail.com>