Fix SQL syntax for migration 50. It failed with PostgreSQL 9.4. (#416)

Dependencies

• [2] NKIBSHBW Fix typo
• [3] ACBS7C6Q hydra-queue-runner: Detect changes to the scheduling shares
• [4] 4YCF3KBG Concurrent hydra-evaluator
• [*] N22GPKYT * Put info about logs / build products in the DB.

Change contents

• replacement in src/sql/hydra.sql at line 96
  [3.10207]→[3.10207:10296](∅→∅)
  − or old.checkInterval != new.checkInterval

  − or old.enabled != new.enabled)
  [3.10207]

  [3.10296]
  + or (old.checkInterval != new.checkInterval)

  + or (old.enabled != new.enabled))
• replacement in src/sql/upgrade-50.sql at line 10
  [2.95]→[3.11106:11156](∅→∅),[3.11106]→[3.11106:11156](∅→∅),[3.11156]→[2.96:135](∅→∅)
  − or old.checkInterval != new.checkInterval

  − or old.enabled != new.enabled)
  [2.95]

  [3.11194]
  + or (old.checkInterval != new.checkInterval)

  + or (old.enabled != new.enabled))