[master] Update .gitignore files

src/lib/datasrc/.gitignore

@@ -3,3 +3,5 @@
 /datasrc_config.h
 /datasrc_config.h.pre
 /static.zone
+/sqlite3_datasrc_messages.cc
+/sqlite3_datasrc_messages.h

tests/lettuce/configurations/xfrin/.gitignore

 /retransfer_master.conf
+/retransfer_master_nons.conf
 /retransfer_slave.conf
+/retransfer_slave_notify.conf

tests/lettuce/data/.gitignore

 /inmem-xfrin.sqlite3
 /test_nonexistent_db.sqlite3
+/xfrin-before-diffs.sqlite3
 /xfrin-notify.sqlite3