containers: Add TCID to sources compiled with -lltp

These are using bunch of libltp interfaces allready from which some
possibly calls tst_brkm() or tst_res(). I wonder why this wasn't problem
before.

Signed-off-by: Cyril Hrubis <metan@ucw.cz>
Revert "lib/tst_kvercmp: fixed a compiling error"

This reverts commit 793ba8a8f6fbf024ff64b88f2669e75a3f5e1e94.

It's no longer needed after the tests were fixed.

Signed-off-by: Cyril Hrubis <metan@ucw.cz>