12454 remove lint library machinery
Reviewed by: Andy Fiddaman <andy@omniosce.org>
Reviewed by: Gordon Ross <gwr@nexenta.com>
Approved by: Dan McDonald <danmcd@joyent.com>

6623052 libcommputil's Makefile.com contains redundant Macro definitions
6623059 libsip's Makefile.com does not use the global CCVERBOSE setting

PSARC 2007/566 Session Description Protocol
6607878 RFE: Session Description Library needed for SIP application developers and other SDP consumers