Index BuildSteps on propagatedFrom

Dependencies

• [2] YF3HTIPF Use partial indexes
• [*] N22GPKYT * Put info about logs / build products in the DB.
• [*] PMNWRTGJ Add multiple output support
• [*] D5QIOJGP * Move everything up one directory.

Change contents

• edit in src/sql/hydra.sql at line 597
  [2.133]

  [5.20632]
  + create index IndexBuildStepsOnPropagatedFrom on BuildSteps(propagatedFrom) where propagatedFrom is not null;
• file addition: upgrade-36.sql (----------)
  [6.3004]
  + create index IndexBuildStepsOnPropagatedFrom on BuildSteps(propagatedFrom) where propagatedFrom is not null;