wacca: fix time free not saving, add counter to profile table

core/data/schema/versions/SDFE_4_rollback.sql

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+ALTER TABLE wacca_profile DROP COLUMN playcount_time_free;

core/data/schema/versions/SDFE_5_upgrade.sql

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+ALTER TABLE wacca_profile ADD playcount_time_free int(11) DEFAULT 0 NULL AFTER playcount_stageup;