[Nice] API change merged -> bump the version

[Kai.Vehmanen at nokia.com]

Hi,

one humble request: if and when the current API is changed, 
please bump the package version when merging those changes
to mainline. There are already users of libnice out there and
this would be a big help to them (they can check at build time
whether the correct libnice version is installed). 

br,
-- 
first.surname at nokia.com (Kai Vehmanen)