CA-142107: Fix logging of signalled/stopped processes

This is to match the recently fixed version in the xs64bit branch of
xen-api-libs.git.

Signed-off-by: Si Beaumont <simon.beaumont@citrix.com>
Correct spelling (s/exitted/exited) in log message

Signed-off-by: Si Beaumont <simon.beaumont@citrix.com>
Merge pull request #4 from simonjbeaumont/ca-142107

CA-142107: Fix logging of signalled/stopped processes