klibc-utils: add explicit dependency on klibc for the shared utils

The two recipes for klibc-utils (static and shared) have been split-off
from a single original recipe for more granular packaging and share the
same SRC_URI set in the .inc file so there is an implicit dependency.
Make it explicit for the utils needing the shared klibc lib at runtime.

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