Don't load requires while parsing compilespec that consume final images

When depending on those package otherwise we try to compile the full
tree instead of reconstrucing the image which is result of a join while
keeping the revdep tree invariate

pkg/tree/compiler_recipe.go

@@ -174,6 +174,7 @@ func (r *CompilerRecipe) Load(path string) error {
 								filepath.Dir(currentpath))
 					}
 					pack.Requires(packbuild.GetRequires())
+
 					pack.Conflicts(packbuild.GetConflicts())
 				}