Add vdbeaux.c to the list of files that must be compiled with -DSQLITE_TEST=1

in order to generate testfixture.  Do not require sqlit3OsDelete() to
succeed on a multi-database commit.  (Ticket #1917) (CVS 3351)

FossilOrigin-Name: dfc833ac79cb255902b20700d6d8949a66af093f

src/vdbeaux.c

@@ -1145,7 +1145,9 @@ static int vdbeCommit(sqlite3 *db){
     ** transaction files are deleted.
     */
     rc = sqlite3OsDelete(zMaster);
-    assert( rc==SQLITE_OK );
+    if( rc ){
+      return rc;
+    }
     sqliteFree(zMaster);
     zMaster = 0;
     rc = sqlite3OsSyncDirectory(zMainFile);