gnutls: bump to version 3.3.12

This is the new stable, so switch to it.
Still no dice with nettle 3.0, see:
http://lists.gnutls.org/pipermail/gnutls-devel/2014-June/006977.html
and nettle upstream:
http://lists.lysator.liu.se/pipermail/nettle-bugs/2014/003129.html

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/gnutls/gnutls.hash

@@ -1,2 +1,2 @@
 # Locally calculated after checking pgp signature
-sha256	824196254cf9162b9ff841677f292d108ca1efa6cf8ae1c02b9a8682a3d7087f	gnutls-3.2.21.tar.xz
+sha256	67ab3e92c5d48f3323b897d7c1aa0bb2af6f3a84f5bd9931cda163a7ff32299b	gnutls-3.3.12.tar.xz

package/gnutls/gnutls.mk

@@ -4,8 +4,8 @@
 #
 ################################################################################
 
-GNUTLS_VERSION_MAJOR = 3.2
-GNUTLS_VERSION = $(GNUTLS_VERSION_MAJOR).21
+GNUTLS_VERSION_MAJOR = 3.3
+GNUTLS_VERSION = $(GNUTLS_VERSION_MAJOR).12
 GNUTLS_SOURCE = gnutls-$(GNUTLS_VERSION).tar.xz
 GNUTLS_SITE = ftp://ftp.gnutls.org/gcrypt/gnutls/v$(GNUTLS_VERSION_MAJOR)
 GNUTLS_LICENSE = GPLv3+ LGPLv2.1+