- allow pid to be specified following -a option for Standalone debugger
- if pid is specified, use it to set the ATTR_ATTACH_PROCESS_ID
setting for the launch configuration
- setting the pid will cause the process dialog not to appear and
the debugger will attempt to debug the given process
- an invalid pid will result in in the dialog being opened
- the pid is not used with the -r option and is ignored
- updated the README file and docs
Change-Id: I5a1d39f97285ad41dcb986dfb4692f9d808bafeb
f433cb1e85