Revert "Removes post-build checks for NSOFF builds."

This reverts commit df50ed884aa269876cb5a38f3011bf9ed1965dd3.

This creates problem with platforms which rely on post_build
phase even if they do not build an NS component (i.e. CS1000)

Signed-off-by: Antonio de Angelis <antonio.deangelis@arm.com>
Change-Id: I0f0a3f32ba212f874d3ddebf00d0753093526046
1 file changed