Change version to 0.40.0 for next release

Signed-off-by: Eric Kunze <eric.kunze@arm.com>
Change-Id: Iee620079018191e3e58627c6d779b94d81d84727
diff --git a/Makefile b/Makefile
index 9fbaeab..63acd97 100644
--- a/Makefile
+++ b/Makefile
@@ -8,7 +8,7 @@
 # by a licensing agreement from ARM Limited.
 #
 
-TOSAREVISION=0.31.0 draft
+TOSAREVISION=0.40.0
 MKDIR=mkdir -p
 ASCIIDOC=asciidoctor
 ASPELL=aspell