Add new noinst-library libosmo-sdp.la.
It will be used by
- osmo-mgw
- libosmo-mgcp-client
- callers of libosmo-mgcp-client may use SDP message parsing (osmo-msc)
The API will, with upcoming patches:
- parse and compose SDP fmtp strings
- manage SDP codecs and codec lists (like 'AMR:octet-align=1#112')
- parse and compose entire SDP messages
In this patch: parse and compose SDP fmtp strings.
Add libosmo-sdp build fu.
Add sdp/fmtp.h and sdp/sdp_strings.h.
Add tests/sdp/sdp_fmtp_test.c.
Change-Id: I6128852f4d249e90319f43d6cd6ed0a9a2ed0430
