tor: security bump to 0.2.8.12

Fixes CVE-2016-1254 - One byte past an allocated buffer read while parsing
hidden service descriptors:

https://blog.torproject.org/blog/tor-02812-released

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/tor/tor.hash

@@ -1,2 +1,2 @@
 # Locally computed
-sha256 c88b8c57b34ebf44b731df5d68f73eb6b6708bcf4e42cf7b4817fd4e304c9c4d  tor-0.2.8.10.tar.gz
+sha256 b35748f2839cf8ce9910b677ea873463495ac88689244c007ed038f6887f4aaf  tor-0.2.8.12.tar.gz

package/tor/tor.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-TOR_VERSION = 0.2.8.10
+TOR_VERSION = 0.2.8.12
 TOR_SITE = https://dist.torproject.org
 TOR_LICENSE = BSD-3c
 TOR_LICENSE_FILES = LICENSE