Fix spec for math/ceil for negative values with negative step
Fix spec for math/ceil for negative values with negative step

mout/mout,Oyamasiphula/mout,MathiasPaumgarten/mout,ChristianGrete/mout,mout/mout,millermedeiros/mout,stevemao/mout,stevemao/mout,millermedeiros/mout,ChristianGrete/mout,Oyamasiphula/mout,MathiasPaumgarten/mout