Add dependency on libuuid, for res_rtp_asterisk

pjproject is what actually requires libuuid.

(closes issue ASTERISK-21125)
reported by Private Name

(Ed. note: Really?  Private Name?  I am rolling my eyes so hard right now.)


git-svn-id: http://svn.asterisk.org/svn/asterisk/branches/11@385356 f38db490-d61c-443f-a65b-d21fe96a405b