vrt: Move major/minor definitions above the history

This puts them closer to the 'NEXT' marker to lower the risk of
overlooking them in the release process.

include/vrt.h

@@ -46,6 +46,10 @@
 #  error "include vdef.h before vrt.h"
 #endif
 
+#define VRT_MAJOR_VERSION	15U
+
+#define VRT_MINOR_VERSION	0U
+
 /***********************************************************************
  * Major and minor VRT API versions.
  *
@@ -249,10 +253,6 @@
  *	vrt_acl type added
  */
 
-#define VRT_MAJOR_VERSION	15U
-
-#define VRT_MINOR_VERSION	0U
-
 /***********************************************************************/
 
 #include <stddef.h>		// NULL, size_t