[CRIU] New "real-life" test suite

[Pavel Emelyanov]

Gentlemen

I've pushed the new test/app-emu dir which should contain tests
for real-life apps, not our synthetic ones.

For now I've added a make -j4 test in there. On my box it passes
and creates 800M image %) Use it and extend with more real-life
tests.

Thanks,
Pavel