Modifying sounds/Makefile to pull down 1.4.24 core sounds

1.4.24 core sounds includes a full set of Italian prompts for core sounds and a fix for the missing voicemail prompts in the Russian language.

(closes issue ASTERISK-19431)
(closes issue ASTERISK-19721)


git-svn-id: http://svn.asterisk.org/svn/asterisk/branches/1.8@386877 f38db490-d61c-443f-a65b-d21fe96a405b