utests/CMakeList.txt: Remove kernel files which generated by utest_generator.py.
utests/CMakeList.txt: Remove kernel files which generated by utest_generator.py.

v1. Remove all files which generated automatically.
v2. Refine the depends of generated test cases.
v3. Fix bug that error occurs while building project outside of source folder.

Signed-off-by: Yi Sun <a7ab858552be010621b3b5c596bf4feb1309fb3c@intel.com>
Reviewed-by: Zhigang Gong <e04a7b9b70b1e4c6318cf117dcd1a9056e14b97a@linux.intel.com>

zhenyw/beignet,wdv4758h/beignet,ignatenkobrain/beignet,zhenyw/beignet,ignatenkobrain/beignet,wdv4758h/beignet,wdv4758h/beignet,zhenyw/beignet,freedesktop-unofficial-mirror/beignet,ignatenkobrain/beignet,zhenyw/beignet,freedesktop-unofficial-mirror/beignet,wdv4758h/beignet,zhenyw/beignet,wdv4758h/beignet,ignatenkobrain/beignet,freedesktop-unofficial-mirror/beignet,ignatenkobrain/beignet,freedesktop-unofficial-mirror/beignet