vdso: image -- Add VMA_AREA_VVAR flag

Will need it to handle vvar zones in a special way.

Because VMA_UNSUPP never goes into the image file
lets reuse bit 12 for VVAR.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Andrew Vagin <avagin@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

include/image.h

@@ -51,8 +51,9 @@
 
 #define VMA_AREA_SYSVIPC	(1 <<  10)
 #define VMA_AREA_SOCKET		(1 <<  11)
+#define VMA_AREA_VVAR		(1 <<  12)
 
-#define VMA_UNSUPP		(1 <<  12)	/* Unsupported VMA */
+#define VMA_UNSUPP		(1 <<  31)	/* Unsupported VMA */
 
 #define CR_CAP_SIZE	2