Open Radar

 
Summary:
Currently if you'd like to access the start time for a process using sysctl in swift. You have to call sysctl, and with the output value, access the start time like this:

```
var processInfo = kinfo_proc()
...
let launchSeconds = processInfo.kp_proc.p_un.__p_starttime.tv_sec
let launchMicroseconds = processInfo.kp_proc.p_un.__p_starttime.tv_usec
```

In Objective-C there is a define like this:

```
#define p_starttime p_un.__p_starttime
```

It would be great if Swift could access this "more stable" identifier.

Steps to Reproduce:
1. Attempt to get the process start time

Expected Results:
You could do so with `processInfo.kp_proc.p_starttime.tv_sec`

Actual Results:
You have to access it through `p_un` like this: `processInfo.kp_proc.p_un.__p_starttime.tv_sec`

Version:
Version 8.3.1 (8E1000a)

Notes:
You can view the current interface of this type here: https://github.com/opensource-apple/xnu/blob/53c5e2e62fc4182595609153d4b99648da577c39/bsd/sys/proc.h#L96