[Sched-tools] rt-app bugs

Hi All,

I faced a couple of issues with rt-app:

1) rt-app rt-app/doc/examples/video-short.jso

I have the following error:

[rt-app] <error> [json] Error while parsing input JSON

2) rt-app rt-app/doc/examples/browser-short.js

When hitting the Ctrl+C while in the:

[rt-app] <notice> Calibrate ns per loop

That leads to:

[513468.106751] Unhandled fault: alignment fault (0x92000021) at 0x0000007f9d0fa7ec Bus error

-- Daniel