Need KTX_CHECK/KTX_REQUIRE for not equal case.

Currently, we use  ```KTX_CHECK(testcase, (function() == 0), 0);``` when need to check is return value of ```function()``` not zero.
If we use KTX_CHECK like the above case, we can only get speculation result as 0 or 1, not the original return value of ``function()```.
So, we need some variant of KTX_CHECK/KTX_REQUIRE.