Remove use of libglib-testing subproject
Just add it as a dependency instead. It’s a lot less painful (git
submodules are still a pain to use; and git evtag
doesn’t work well
with them); and libglib-testing has just done a 0.1.0 release which we
can depend on.
Signed-off-by: Philip Withnall withnall@endlessm.com
Edited by Philip Withnall