call qsprintf() without warnings

Summary:
After T13217 import_repository_symbols.php was showing a lot of warnings, using %LQ fixes that.
I'm aware, that there are changes planned to the whole managing the symbols complex but until then less warnings are nice.

Test Plan: No more warnings when updating symbols

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D19962

Author: Marc Lindenberg

scripts/symbols/import_repository_symbols.php

@@ -110,9 +110,9 @@ function commit_symbols(
       $conn_w,
       'INSERT INTO %T
         (repositoryPHID, symbolContext, symbolName, symbolType,
-        symbolLanguage, lineNumber, pathID) VALUES %Q',
+        symbolLanguage, lineNumber, pathID) VALUES %LQ',
       $symbol->getTableName(),
-      implode(', ', $chunk));
+      $chunk);
   }
 }