Update toxcore version to 0.2.2

src/freedombone-app-tox

 
 # upstream is https://github.com/TokTok/c-toxcore
 TOXCORE_REPO="https://github.com/bashrc/toxcore"
-TOXCORE_COMMIT='987ad5eac173442d6ad2d5cd80c2da763a815a9a'
+TOXCORE_COMMIT='7d399cedcfd20f0d91a8caf386ae3c63f4dcf285'
 
 TOXID_REPO="https://github.com/bashrc/toxid"
 TOX_BOOTSTRAP_ID_FILE=/var/lib/tox-bootstrapd/pubkey.txt