contrib/REQUIRED_PACKAGES: ignore for non-existing packages "dbus-python", "pygobject3-base" on Fedora 32

These packages no longer exist on Fedora 32 and dnf fails due to
that. Ignore such errors.

(cherry picked from commit bdd45e6afa)
(cherry picked from commit 27664ff425)
(cherry picked from commit e573f77855)

contrib/fedora/REQUIRED_PACKAGES

@@ -46,7 +46,6 @@ install \
     bluez-libs-devel \
     dbus-devel \
     dbus-glib-devel \
-    dbus-python \
     dbus-x11 \
     dhclient \
     gcc-c++ \
@@ -73,7 +72,6 @@ install \
     polkit-devel \
     ppp \
     ppp-devel \
-    pygobject3-base \
     python3-dbus \
     python3-gobject \
     qt-devel \
@@ -90,4 +88,6 @@ install \
 # some packages don't exist in certain distributions. Install them one-by-one, and ignore errors.
 install_ignore_missing \
     python-gobject-base \
+    dbus-python \
+    pygobject3-base \
     #end