mbedtls: security bump to version 2.6.0

Fixes CVE-2017-14032: authentication bypass.

https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2017-02

Add license hash.

Cc: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/mbedtls/mbedtls.hash

@@ -1,2 +1,5 @@
-# From https://tls.mbed.org/tech-updates/releases/mbedtls-2.4.2-2.1.7-and-1.3.19-released
-sha256	17dd98af7478aadacc480c7e4159e447353b5b2037c1b6d48ed4fd157fb1b018	mbedtls-2.4.2-apache.tgz
+# From https://tls.mbed.org/tech-updates/releases/mbedtls-2.6.0-2.1.9-and-1.3.21-released
+sha1	e914288da50977f541773f9d36e26f14926594a5	mbedtls-2.6.0-apache.tgz
+sha256	99bc9d4212d3d885eeb96273bcde8ecc649a481404b8d7ea7bb26397c9909687	mbedtls-2.6.0-apache.tgz
+# Locally calculated
+sha256	cfc7749b96f63bd31c3c42b5c471bf756814053e847c10f3eb003417bc523d30	apache-2.0.txt

package/mbedtls/mbedtls.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 MBEDTLS_SITE = https://tls.mbed.org/code/releases
-MBEDTLS_VERSION = 2.4.2
+MBEDTLS_VERSION = 2.6.0
 MBEDTLS_SOURCE = mbedtls-$(MBEDTLS_VERSION)-apache.tgz
 MBEDTLS_CONF_OPTS = \
 	-DENABLE_PROGRAMS=$(if $(BR2_PACKAGE_MBEDTLS_PROGRAMS),ON,OFF) \