patch 8.1.0378: CI build failure

Problem:    CI build failure.
Solution:   Include vim.h as ../vim.h.  Fix compiler warning.
diff --git a/src/version.c b/src/version.c
index 18acc39..2e64eec 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    378,
+/**/
     377,
 /**/
     376,