Use the same start/stop time for the build steps as for the build

Dependencies

• [2] JGLE5BRN Add separate build step status codes for cached failures and timeouts
• [3] 4SJPAAJX Pass failing dependent builds to buildFinished
• [4] MNZ67UXO If a build step fail, immediately fail all queued builds that depend on it
• [*] 7YBYT2LQ

Change contents

• replacement in src/script/hydra-build at line 74
  [2.292]→[3.1383:1454](∅→∅),[3.1383]→[3.1383:1454](∅→∅)
  − , starttime => time

  − , stoptime => time
  [2.292]

  [3.1454]
  + , starttime => $time

  + , stoptime => $time