we knowingly leak that during the unit tests

Change-Id: I89da499ee654b0803c3485227641e4d97db8ec60
Reviewed-on: https://gerrit.libreoffice.org/23171Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>
Tested-by: Markus Mohrhard <markus.mohrhard@googlemail.com>

leak-suppress.txt

@@ -41,3 +41,6 @@ leak:libfontconfig.so
 # ignore libGL related leaks, most likely false positives
 # libGL is not built with asan/lsan
 leak:libGL.so
+
+# knowingly leaked in the unit tests to get a SfxMedium
+leak:SfxObjectShell::DoInitUnitTest