contrib: bump GnuTLS to 3.6.2

Change-Id: Ic2410ea2c4015383a0cff84f9ba0131b0168b61e
Reviewed-by: Philippe Gorley <philippe.gorley@savoirfairelinux.com>

contrib/src/gnutls/SHA512SUMS

 
 60fc3409ee81932bc2672c68eb65748b88da4b9307764fb395dbadc06120e1011207a04d5f540e77a4d07649ffaed0789c04d57692eeca6ab24ac79d72418906  gnutls-3.5.10.tar.xz
+1f2bd3203ea96844c531be700b44623b79f46743143edf97011aab07895ca18d62f1659c7fafc5e1c4b0686fde490836f00358bdd60d6ac0b842526db002da23  gnutls-3.6.1.tar.xz
+6a574d355226bdff6198ab3f70633ff2a3cff4b5d06793bdaf19d007063bd4dd515d1bd3f331a9eb1a9ad01f83007801cfa55e5fd16c1cd3461ac33d1813fb06  gnutls-3.6.2.tar.xz

contrib/src/gnutls/rules.mak

 # GnuTLS
 
-GNUTLS_VERSION := 3.5.10
-GNUTLS_URL := https://www.gnupg.org/ftp/gcrypt/gnutls/v3.5/gnutls-$(GNUTLS_VERSION).tar.xz
+GNUTLS_VERSION := 3.6.2
+GNUTLS_URL := https://www.gnupg.org/ftp/gcrypt/gnutls/v3.6/gnutls-$(GNUTLS_VERSION).tar.xz
 
 PKGS += gnutls
 
-ifeq ($(call need_pkg,"gnutls == 3.5.10"),)
+ifeq ($(call need_pkg,"gnutls >= 3.5.17"),)
 PKGS_FOUND += gnutls
 endif
 
@@ -49,7 +49,7 @@ GNUTLS_CONF := \
 	--disable-nls \
 	--disable-dtls-srtp-support \
 	--without-libintl-prefix \
-	--disable-non-suiteb-curves \
+	--without-idn \
 	$(HOSTCONF)
 
 ifdef HAVE_ANDROID