QL: Also update qltest.cmd

Author: tausbn

tools/qltest.cmd

@@ -4,6 +4,8 @@ type NUL && "%CODEQL_DIST%\codeql.exe" database index-files ^
     --prune=**/*.testproj ^
     --include-extension=.ql ^
     --include-extension=.qll ^
+    --include-extension=.dbscheme ^
+    --include-extension=.yml ^
     --size-limit=5m ^
     --language=ql ^
     "%CODEQL_EXTRACTOR_QL_WIP_DATABASE%"