Since commit 2f160e0f ("tci: Add
implementation for INDEX_op_ld16u_i64") has been included now, we
can also run the TCG tests with tci, so let's enable them in our
Gitlab CI now.

Message-Id: <20191127155105.3784-1-thuth@redhat.com>
Signed-off-by: NThomas Huth <thuth@redhat.com>