Fix making tests.
Fix making tests.

Commit 9cfbd55e removed "./" prefix of the TESTS variable in the
Makefile but the recipe of target tests was expecting it. Fixed by
prepending "./" to the tests recipe.

lu-zero/kvazaar,ultravideo/kvazaar,lu-zero/kvazaar,ultravideo/kvazaar,ultravideo/kvazaar,lu-zero/kvazaar,ultravideo/kvazaar,ultravideo/kvazaar,lu-zero/kvazaar