The source project of this merge request has been removed.
Don't attempt to track symbols in Python lib.
Remove the weird symbols.in file.
Set DH_VERBOSE=1 for easier debugging.
See http://bugs.debian.org/972912#20 and http://bugs.debian.org/972912#30 for more details on my reasoning.
Note: I can confirm that this makes the package build in my environment and against unstable and that samba continues to build fine in both as well (with the changed ldb package).