version: update to 20170724

This is aimed to go to QEMU v2.10.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
diff --git a/VERSION b/VERSION
index 3e2cdab..b3087e5 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-20170303
+20170724