udisks2: don't leak GIcon when applying hints
udisks2: don't leak GIcon when applying hints

Signed-off-by: David Zeuthen <28530fef9e2e0b434a729cd52034a7c3086e28c1@gmail.com>
gicmo/gvfs,xkahn/gvfs-cmis,xkahn/gvfs-cmis,halfline/gvfs,xkahn/gvfs-cmis,halfline/gvfs,halfline/gvfs,gicmo/gvfs,gicmo/gvfs,xkahn/gvfs-cmis,gicmo/gvfs