xen: sync include/xen/interface/version.h

Sync include/xen/interface/version.h with the Xen source.

Signed-off-by: Juergen Gross <[e-mail]>
Reviewed-by: Boris Ostrovsky <[e-mail]>
Reviewed-by: Stefano Stabellini <[e-mail]>
Signed-off-by: Juergen Gross <[e-mail]>

include/xen/interface/version.h

···
 /* arg == xen_domain_handle_t. */
 #define XENVER_guest_handle 8
 
+#define XENVER_commandline 9
+struct xen_commandline {
+	char buf[1024];
+};
+
+/*
+ * Return value is the number of bytes written, or XEN_Exx on error.
+ * Calling with empty parameter returns the size of build_id.
+ */
+#define XENVER_build_id 10
+struct xen_build_id {
+	uint32_t	len; /* IN: size of buf[]. */
+	unsigned char	buf[];
+};
+
 #endif /* __XEN_PUBLIC_VERSION_H__ */