db.sqlite: Append layouts:cell to sqlite file test db name. Fixes #647.

basis/db/sqlite/sqlite-tests.factor

@@ -1,10 +1,10 @@
 USING: io io.files io.files.temp io.directories io.launcher
 kernel namespaces prettyprint tools.test db.sqlite db sequences
 continuations db.types db.tuples unicode.case accessors arrays
-sorting ;
+sorting layouts ;
 IN: db.sqlite.tests
 
-: db-path ( -- path ) "test.db" temp-file ;
+: db-path ( -- path ) "test-" cell number>string ".db" 3append temp-file ;
 : test.db ( -- sqlite-db ) db-path <sqlite-db> ;
 
 [ ] [ [ db-path delete-file ] ignore-errors ] unit-test