qcacmn: add debugging code to detect duplicated hash_node

One hash_node is still left in hash bucket list while the memory
has been freed by normal operation, suspect that maybe two same
hash_node is existed in hash bucket list before, add debugging code
to detect this problem earlier.

Change-Id: I1497ae29c0e09e35dc140c7c37e228e02eb000e4
CRs-Fixed: 2562952
1 file changed