patch 8.0.1329: when a flaky test fails it also often fails the second time

Problem:    When a flaky test fails it also often fails the second time.
Solution:   Sleep a couple of seconds before the second try.
diff --git a/src/testdir/runtest.vim b/src/testdir/runtest.vim
index 8eef166..c953d6d 100644
--- a/src/testdir/runtest.vim
+++ b/src/testdir/runtest.vim
@@ -286,6 +286,10 @@
     call add(s:messages, 'Flaky test failed, running it again')
     let first_run = v:errors
 
+    " Flakiness is often caused by the system being very busy.  Sleep a couple
+    " of seconds to have a higher chance of succeeding the second time.
+    sleep 2
+
     let v:errors = []
     call RunTheTest(s:test)
     if len(v:errors) > 0
diff --git a/src/version.c b/src/version.c
index d311de9..93fb5cb 100644
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1329,
+/**/
     1328,
 /**/
     1327,