Add missing dependency in create_mock_soong

This change adds missing dependency of Soong modules as symlink
directory in create_mock_soong so that a correct ninja graph can be
created when invoking androidmk_test.sh.

Test: build/soong/test/run_integration_tests.sh
Bug: 283905797
Change-Id: I7dff0094fdc23b7c438c917dbc00a5143a4dc5ae