c-ares: security bump to version 1.12.0

Fixes:
CVE-2016-5180 - ares_create_query single byte out of buffer write

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

package/c-ares/c-ares.hash

@@ -1,2 +1,2 @@
 # Locally calculated after checking pgp signature
-sha256 b3612e6617d9682928a1d50c1040de4db6519f977f0b25d40cf1b632900b3efd c-ares-1.11.0.tar.gz
+sha256 8692f9403cdcdf936130e045c84021665118ee9bfea905d1a76f04d4e6f365fb c-ares-1.12.0.tar.gz

package/c-ares/c-ares.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-C_ARES_VERSION = 1.11.0
+C_ARES_VERSION = 1.12.0
 C_ARES_SITE = http://c-ares.haxx.se/download
 C_ARES_INSTALL_STAGING = YES
 C_ARES_CONF_OPTS = --with-random=/dev/urandom