patch 8.0.0384: timer test failed for no apparent reason

Problem:    Timer test failed for no apparent reason.
Solution:   Mark the test as flaky.
diff --git a/src/testdir/runtest.vim b/src/testdir/runtest.vim
index 0c0a197..71028a1 100644
--- a/src/testdir/runtest.vim
+++ b/src/testdir/runtest.vim
@@ -165,6 +165,7 @@
       \ 'Test_collapse_buffers()',
       \ 'Test_communicate()',
       \ 'Test_nb_basic()',
+      \ 'Test_oneshot()',
       \ 'Test_pipe_through_sort_all()',
       \ 'Test_pipe_through_sort_some()',
       \ 'Test_reltime()',
diff --git a/src/version.c b/src/version.c
index 232b65d..713b54c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    384,
+/**/
     383,
 /**/
     382,