Fix xdg-open. (#10773)
Fix xdg-open. (#10773)

Previously desktop applications failed to launch, falling back
to console programs if available.
benjyw/pants,benjyw/pants,pantsbuild/pants,benjyw/pants,jsirois/pants,pantsbuild/pants,jsirois/pants,benjyw/pants,jsirois/pants,benjyw/pants,pantsbuild/pants,pantsbuild/pants,pantsbuild/pants,benjyw/pants,pantsbuild/pants,benjyw/pants,pantsbuild/pants