JOHNE - When building libgio, set some arbitrary environment variables to solve an obscure build issue
JOHNE - When building libgio, set some arbitrary environment variables to solve an obscure build issue

(see bugzilla:- https://bugzilla.gnome.org/show_bug.cgi?id=786785)

A recent change (in gdbus-codegen.in) caused my build to fail in MSVC. Eventually I realised that the problem had always been present - except that some previous code in gdbus-gondegen.in had effectively been masking it. Setting these environment variables has the same effect of masking the build issue (which seems to be some kind of problem with Python).

johne53/MB3Glib,johne53/MB3Glib,johne53/MB3Glib,johne53/MB3Glib,johne53/MB3Glib,johne53/MB3Glib