fix(tftf): add pack_realm to all

This patch add pack_realm to target all, in order to build pack realm
to tftf by default when user make without specifying a target

Signed-off-by: Nabil Kahlouche <nabil.kahlouche@arm.com>
Change-Id: Ide20ed994777000111924ee4239b77123a3eeed5
1 file changed