Unreviewed build fix after r174477.
* init-database.sql: Removed build_commits_index since it's redundant with build_commit's primary key.
Also fixed a syntax error that we were missing "," after line that declared build_commit column.
* public/api/runs.php: Fixed the query so that test_runs without commits data will be retrieved.
This is necessary for baseline and target values manually added via admin pages.
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@174486
268f45cc-cd09-0410-ab3c-
d52691b4dbfc