Update libgdata to 0.18.0. It maintains API compatibility and because of that
all dependend ports still build.
While here introduce uhttpmock, which libgdata wants since 0.18.0. Because
uhttpmock is hosted on gitorious and hasn't made any official release yet I
use the current date plus a pseudo-version used in one of the revisions as
the PORTVERSION.


git-svn-id: svn://creme-brulee.marcuscom.com/ports/trunk@19887 df743ca5-7f9a-e211-a948-0013205c9059
Update libchamplain to 0.12.9.


git-svn-id: svn://creme-brulee.marcuscom.com/ports/trunk@19888 df743ca5-7f9a-e211-a948-0013205c9059