Fix seeder linking due to missing dependency in libcommon

Summary:
common has multiple dependencies in bitcoinconsensus

This patch cleans up the linking mess in the seeder as a result of the fix.

Test Plan:

ninja all bitcoin-seeder check-seeder

Reviewers: #bitcoin_abc, majcosta

Reviewed By: #bitcoin_abc, majcosta

Differential Revision: https://reviews.bitcoinabc.org/D8622