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.

src/testdir/runtest.vim

@@ -165,6 +165,7 @@ let s:flaky = [
       \ 'Test_collapse_buffers()',
       \ 'Test_communicate()',
       \ 'Test_nb_basic()',
+      \ 'Test_oneshot()',
       \ 'Test_pipe_through_sort_all()',
       \ 'Test_pipe_through_sort_some()',
       \ 'Test_reltime()',

src/version.c

@@ -764,6 +764,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    384,
 /**/
     383,
 /**/