uclibc: Add libgcc-initial to DEPENDS

Now Separated out libgcc-initial is there

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
cross: Drop package tasks

Cross packages are not packaged so we can drop all the packaging tasks
for some small performance improvements.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>