These are larger C++ libs and without gdb-index gdb takes a moment
to load such libs.

Change-Id: I555a629199f761060199a528415f7d5fbe9d9533
Reviewed-on: https://gerrit.libreoffice.org/71822
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>