On Phosh, the EWOULDBLOCK error may be emitted when reading from the
Wayland socket, which is not fatal. Ignore errors encountered while
reading, as fatal errors would be emitted by other operations in the
main loop.
It should be possible to build both Wayland (sans D-Bus) and GNOME
versions simultaneously. Add a Wayland target, and, for consistency,
rename the GNOME target.
