programs/fileio/pkg/fix-race-in-rnd.patch: resolve race issue during random test

The issue is like

	FATAL: Failed to fsync file! file: 0 errno = 22 (Invalid argument)

Link: akopytov/sysbench#400
Link: akopytov/sysbench#518
Signed-off-by: Philip Li <[email protected]>

Author: rli9

programs/fileio/pkg/fix-race-in-rnd.patch

@@ -0,0 +1,13 @@
+diff --git a/src/tests/fileio/sb_fileio.c b/src/tests/fileio/sb_fileio.c
+index 5a00376..f6ebbb7 100644
+--- a/src/tests/fileio/sb_fileio.c
++++ b/src/tests/fileio/sb_fileio.c
+@@ -489,6 +489,8 @@ sb_event_t file_get_rnd_request(int thread_id)
+   unsigned int         i;
+
+   sb_req.type = SB_REQ_TYPE_FILE;
++  SB_THREAD_MUTEX_LOCK();
++  log_text(LOG_NOTICE, "file_get_rnd_request: SB_THREAD_MUTEX_LOCK is called\n");
+
+   if (test_mode == MODE_RND_RW)
+   {