patch 8.1.2409: creating the distribution doesn't work as documented

Problem:    Creating the distribution doesn't work as documented.
Solution:   Adjust name of uninstall binary. Create src/auto directory if
            needed.
diff --git a/src/Make_mvc.mak b/src/Make_mvc.mak
index 9a01927..1a74d3b 100644
--- a/src/Make_mvc.mak
+++ b/src/Make_mvc.mak
@@ -1570,6 +1570,7 @@
 	$(CC) $(CFLAGS_OUTDIR) $(LUA_INC) if_lua.c
 
 auto/if_perl.c : if_perl.xs typemap
+	-mkdir auto
 	$(XSUBPP) -prototypes -typemap $(XSUBPP_TYPEMAP) \
 		-typemap typemap if_perl.xs -output $@
 
diff --git a/src/version.c b/src/version.c
index b8e4cf2..b11a6c7 100644
--- a/src/version.c
+++ b/src/version.c
@@ -743,6 +743,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2409,
+/**/
     2408,
 /**/
     2407,