Build symlinks for -host and -target phony modules

Move extra module dependencies like symlinks from dependencies of
$(my_register_name) to $(my_all_targets), and make $(my_register_name)
and other convenience phony modules depend on $(my_all_targets).  Move
$(LOCAL_MODULE)-host/-target to depend on $(my_all_targets) instead of
directly depending on the built and installed modules.

Change-Id: I3b093986db7a1bff118f1f2482275f0997a98fb6