patch 8.2.0271: the "num64" feature is available everywhere

Problem:    The "num64" feature is available everywhere and building without
            it causes problems.
Solution:   Graduage the "num64" feature. (James McCoy, closes #5650)
diff --git a/src/version.c b/src/version.c
index e27ac71..ad70c4d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -436,11 +436,7 @@
 #else
 	"-netbeans_intg",
 #endif
-#ifdef FEAT_NUM64
 	"+num64",
-#else
-	"-num64",
-#endif
 #ifdef FEAT_GUI_MSWIN
 # ifdef FEAT_OLE
 	"+ole",
@@ -743,6 +739,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    271,
+/**/
     270,
 /**/
     269,