build our handlerton on freebsd. addresses #1789

git-svn-id: file:///svn/toku/tokudb@12466 c7de825b-a66e-492c-adef-691d508d4ae1

linux/toku_os_types.h

@@ -6,6 +6,7 @@ extern "C" {
 #endif
 
 #include <sys/types.h>
+#include <sys/stat.h>
 
 typedef int toku_os_handle_t;