Need to update URL of uhttpmock.
The URL of uhttpmock using currently https://github.com/pwithnall/uhttpmock is outdated, and the source code from this URL cannot configure with automake 1.16, the correct repo is https://gitlab.com/uhttpmock/uhttpmock, temp workaround is add branches['uhttpmock'] = ('https://gitlab.com/uhttpmock/uhttpmock.git', 'master')
to ~/.config/jhbuildrc
.