Improve advice for attaching the debugger

Change-Id: I6ca5697a8b672a1e20bcb7999cf4d9ba544f9558
Reviewed-on: https://swiftshader-review.googlesource.com/3117
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Greg Hartman <ghartman@google.com>
1 file changed