polarssl: security bump to version 1.2.12

Fixes several memory leaks.
No assigned CVE or Polar-SA yet.

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

package/polarssl/polarssl.hash

@@ -1,3 +1,2 @@
-# From https://polarssl.org/tech-updates/releases/polarssl-1.2.11-released
-sha1	40cb3a833245273946c2075e6c948bbcda8a1be9	polarssl-1.2.11-gpl.tgz
-sha256	b3e9d059c687980976b468d8260f658e9003aede1dbc4a918526e90abdaa7d75	polarssl-1.2.11-gpl.tgz
+# From https://polarssl.org/tech-updates/releases/polarssl-1.2.12-released
+sha256	63dd60e78d25c438648607bb177b063dcf5fbf3ced9ee794fcb165d101940131	polarssl-1.2.12-gpl.tgz

package/polarssl/polarssl.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 POLARSSL_SITE = https://polarssl.org/code/releases
-POLARSSL_VERSION = 1.2.11
+POLARSSL_VERSION = 1.2.12
 POLARSSL_SOURCE = polarssl-$(POLARSSL_VERSION)-gpl.tgz
 POLARSSL_CONF_OPTS = \
 	-DENABLE_PROGRAMS=$(if $(BR2_PACKAGE_POLARSSL_PROGRAMS),ON,OFF)