license: internal Pixman is used, when internal Cairo is used

Change-Id: I482f6b88314737a793e1d9e9ec1375d49ef676a3
Reviewed-on: https://gerrit.libreoffice.org/69491
Tested-by: Jenkins
Reviewed-by: Andras Timar <andras.timar@collabora.com>

readlicense_oo/license/license.xml

@@ -1357,6 +1357,7 @@
         Use of any of this software is governed by the terms of the license below:</p>
         <p><a href="#a__LGPL_version_2_1">Jump to LGPL Version 2.1</a></p>
     </div>
+    <div class="CAIRO">
         <h2>Pixman</h2>
         <p>The following software may be included in this product: Pixman (libpixman). Use of any of this software is
         governed by the terms of the license below:</p>
@@ -1391,6 +1392,7 @@
         AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
         TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
         SOFTWARE.</p>
+    </div>
     <div class="POPPLER">
         <h2>poppler</h2>
         <p>The following software may be included in this product: poppler. Use of any of this software is governed by