test/runpty.c: Add more detail to "timed out" message.
test/runpty.c: Add more detail to "timed out" message.

test/install-mh/test-version-check was skipped due to timeout, but it
took a lot less than the thirty-second timeout to run.  Add start time
and the time now to the diagnostic, and select(2)'s return value.

mcr/nmh,mcr/nmh