patch 9.0.0463: command line test leaves directory behind

Problem:    Command line test leaves directory behind.
Solution:   Use the "R" flag on the first mkdir(). (Dominique Pellé,
            closes #11127)
diff --git a/src/version.c b/src/version.c
index f180566..1c2e49f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -704,6 +704,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    463,
+/**/
     462,
 /**/
     461,