libgcrypt: security bump to version 1.7.9

Fixes CVE-2017-0379: Mitigate a local side-channel attack on Curve25519
dubbed "May the Fourth be With You".

As we are close to release, don't update to the latest 1.8.1 version,
but to a maintenance release from the 1.7 branch.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
(cherry picked from commit cd4514109a6bd248d6ca7713d97e3b257ae91c6f)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libgcrypt/libgcrypt.hash

@@ -1,5 +1,3 @@
-# From https://lists.gnupg.org/pipermail/gnupg-announce/2017q2/000408.html
-sha1  65a4a495aa858483e66868199eaa8238572ca6cd  libgcrypt-1.7.8.tar.bz2
 # Locally calculated after checking signature
-# https://gnupg.org/ftp/gcrypt/libgcrypt/libgcrypt-1.7.8.tar.bz2.sig
-sha256  948276ea47e6ba0244f36a17b51dcdd52cfd1e664b0a1ac3bc82134fb6cec199  libgcrypt-1.7.8.tar.bz2
+# https://gnupg.org/ftp/gcrypt/libgcrypt/libgcrypt-1.7.9.tar.bz2.sig
+sha256  bfe9bb703c1126c3647da2810fd23039c2f09d46969f71612c2065dc3fa9373b  libgcrypt-1.7.9.tar.bz2

package/libgcrypt/libgcrypt.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBGCRYPT_VERSION = 1.7.8
+LIBGCRYPT_VERSION = 1.7.9
 LIBGCRYPT_SOURCE = libgcrypt-$(LIBGCRYPT_VERSION).tar.bz2
 LIBGCRYPT_LICENSE = LGPLv2.1+
 LIBGCRYPT_LICENSE_FILES = COPYING.LIB