gnutls: bump to version 3.2.21

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/gnutls/gnutls.hash

@@ -1,2 +1,2 @@
 # Locally calculated after checking pgp signature
-sha256	7967057e78c3ed968e524a07ab262681219b73001ab8e75cbc4f1a506abdb598	gnutls-3.2.20.tar.xz
+sha256	824196254cf9162b9ff841677f292d108ca1efa6cf8ae1c02b9a8682a3d7087f	gnutls-3.2.21.tar.xz

package/gnutls/gnutls.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 GNUTLS_VERSION_MAJOR = 3.2
-GNUTLS_VERSION = $(GNUTLS_VERSION_MAJOR).20
+GNUTLS_VERSION = $(GNUTLS_VERSION_MAJOR).21
 GNUTLS_SOURCE = gnutls-$(GNUTLS_VERSION).tar.xz
 GNUTLS_SITE = ftp://ftp.gnutls.org/gcrypt/gnutls/v$(GNUTLS_VERSION_MAJOR)
 GNUTLS_LICENSE = GPLv3+ LGPLv2.1+