patch 8.1.1236: sjiscorr.c not found in shadow directory

Problem:    sjiscorr.c not found in shadow directory. (Tony Mechelynck)
Solution:   Link po/*.c files with "make shadow".
diff --git a/src/version.c b/src/version.c
index 5cba456..0e91cc6 100644
--- a/src/version.c
+++ b/src/version.c
@@ -768,6 +768,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1236,
+/**/
     1235,
 /**/
     1234,