Re-port to linux after porting to windows

git-svn-id: file:///svn/toku/tokudb@11528 c7de825b-a66e-492c-adef-691d508d4ae1

src/tests/checkpoint_stress.c

@@ -3,6 +3,7 @@
 #ident "$Id$"
 
 #include "test.h"
+#include "toku_pthread.h"
 #include <db.h>
 #include <sys/stat.h>
 #include "checkpoint_test.h"