X86: Update gas/NEWS for Intel APX.

gas/ChangeLog:

        * NEWS: Added "APX_F is fully supportted" to gas/NEWS.
diff --git a/gas/NEWS b/gas/NEWS
index 86a53fc..42c9029 100644
--- a/gas/NEWS
+++ b/gas/NEWS
@@ -1,6 +1,6 @@
 -*- text -*-
 
-* Support CFCMOV feature in Intel APX.
+* Support CFCMOV feature in Intel APX. Now, APX_F is fully supportted.
 
 * Support CCMP and CTEST feature in Intel APX.