Send 'Unable to obtain appname' message to stdout
In operf_process_info::set_appname, we look at /proc/<PID>/exe
to see if we can obtain the process's appname. However, the
process may have already ended, in which case we print the message
"Unable to obtain appname from /proc/<PID>/exe"
This error message should *NOT* be sent to stderr, but instead,
should go to stdout so that it's not seen on the screen when doing:
operf --verbose=all <cmd> > out-file
Signed-off-by: Maynard Johnson <email@example.com>
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