Simon McVittie authored Jul 14, 2022 and Philip Withnall committed Jul 25, 2022

This is an internal helper executable, which users shouldn't invoke
directly (see glib#1633).

When building for a single-architecture distribution, we can install
it as ${libexecdir}/gio-launch-desktop.

When building for a multiarch distribution, installing it into an
architecture-specific location and packaging it alongside the GLib
library avoids the problem discussed in glib#1633 where it would either
cause a circular dependency between the GLib library and a common
cross-architecture package (libglib2.0-bin in Debian), or require a
separate package just to contain gio-launch-desktop, or cause different
architectures' copies to overwrite each other.

Signed-off-by: Simon McVittie <smcv@collabora.com>