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/Makefile b/src/Makefile
index 3692e18..656c5ee 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -2784,7 +2784,7 @@
 	mkdir $(SHADOWDIR)/auto
 	cd $(SHADOWDIR)/auto; ln -s ../../auto/configure .
 	$(MKDIR_P) $(SHADOWDIR)/po
-	cd $(SHADOWDIR)/po; ln -s ../../po/*.po ../../po/*.mak ../../po/*.vim ../../po/*.in ../../po/Makefile .
+	cd $(SHADOWDIR)/po; ln -s ../../po/*.po ../../po/*.mak ../../po/*.vim ../../po/*.in ../../po/Makefile ../../po/*.c .
 	cd $(SHADOWDIR); rm -f auto/link.sed
 	cp Makefile configure $(SHADOWDIR)
 	rm -f $(SHADOWDIR)/auto/config.mk $(SHADOWDIR)/config.mk.dist
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,