Do not consider quiet moves as attacks

Do not consider quiet moves as attacks

Fix attack bitboard calculation for hoppelpoppel-style pieces.

hoppelpoppel STC
LLR: 2.94 (-2.94,2.94) [0.00,10.00]
Total: 863 W: 335 L: 247 D: 281
http://35.161.250.236:6543/tests/view/5d8d0ab36e23db3768ec085c

hoppelpoppel LTC
LLR: 2.96 (-2.94,2.94) [0.00,10.00]
Total: 717 W: 271 L: 187 D: 259
http://35.161.250.236:6543/tests/view/5d8d0d8f6e23db3768ec085f

chess STC
LLR: 3.00 (-2.94,2.94) [-10.00,5.00]
Total: 1338 W: 317 L: 279 D: 742
http://35.161.250.236:6543/tests/view/5d8d16766e23db3768ec0861