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".

src/version.c

@@ -767,6 +767,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1236,
 /**/
     1235,
 /**/