piglit: remove three tests from blacklist
These tests were tested. The issue was in piglit. Commit provided the fix is d44351e757ca176c48a0fda8f48587055fc2c92f BZ: https://bugs.freedesktop.org/show_bug.cgi?id=107677 Signed-off-by: Pavlo Chelombitko pavlo.chelombitko@globallogic.com