In commit 5b6b731c7d8ecbae0ead1600b4cd2f70c66d51ca, the libtool-2.4.7
package was removed as a "duplicate". The commit message doesn't explain at
all why libtool 2.4.7 was being removed, or what it was a duplicate of? As
of latest master, libtool is still version 2.4.6.

Thanks.