patch 8.0.1564: too many #ifdefs

Problem:    Too many #ifdefs.
Solution:   Graduate the +autocmd feature. Takes away 450 #ifdefs and
            increases code size of tiny Vim by only 40 Kbyte.
diff --git a/src/version.c b/src/version.c
index c780826..18d50af 100644
--- a/src/version.c
+++ b/src/version.c
@@ -78,11 +78,7 @@
 #else
 	"-arabic",
 #endif
-#ifdef FEAT_AUTOCMD
 	"+autocmd",
-#else
-	"-autocmd",
-#endif
 #ifdef FEAT_AUTOSERVERNAME
 	"+autoservername",
 #else
@@ -779,6 +775,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1564,
+/**/
     1563,
 /**/
     1562,