[master] 997e6c8 Bump VRT to 6.1

[Dridi Boukelmoune]

commit 997e6c8a164a1ec9afafef6c40ff463cebfadc85
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Mon Apr 10 13:35:47 2017 +0200

    Bump VRT to 6.1
    
    It should have been done for 5.1.2 but hasn't. This is a minor bump of a
    single addition so the impact is limited. I also left the release date
    to "unreleased" on purpose, since it technically hasn't been released as
    6.1 yet.

diff --git a/include/vrt.h b/include/vrt.h
index 625bc36..b8377f3 100644
--- a/include/vrt.h
+++ b/include/vrt.h
@@ -67,7 +67,7 @@
 
 #define VRT_MAJOR_VERSION	6U
 
-#define VRT_MINOR_VERSION	0U
+#define VRT_MINOR_VERSION	1U
 
 
 /***********************************************************************/