configure.ac: Fix gnutls version check (with dco-sign-off)
This version number is hexadecimal
See gnutls/gnutls.h
#define GNUTLS_VERSION "3.6.13" #define GNUTLS_VERSION_MAJOR 3 #define GNUTLS_VERSION_MINOR 6 #define GNUTLS_VERSION_PATCH 13 #define GNUTLS_VERSION_NUMBER 0x03060d
@dwmw2 includes a signed-off-by now.
Edited by Manuel Rüger