Insert marker on iOS log for test start point.

[isonic1]

idevicelog is capturing data before test runs. Insert a line in the log to reference the test start point.

[sskorol]

@isonic1 thanks for this one. Do you also want to add logcat -c before starting a new log on android?

-c	Clears (flushes) the entire log and exits.

[isonic1]

@sskorol Yeah, thats a good idea. Will add that too.

[isonic1]

I added the command to clear the android log. I couldn't however insert a line into the idevicelog file as it's blocked by that process. I didn't spend a whole lot of time finding a solution, though. When I have another chance I'll try to figure it out.