support the bool tensor and scalar in elementwise ops

[wawltor]

PR types

Performance optimization

PR changes

APIs

Describe

support the bool tensor and scalar
之前的版本bool + float的输出一个bool的输出，修复之后即为float类型的输出

import paddle
a = 1.5
b = paddle.full([2, 2, 2], True, dtype='bool')
c = a + b
print(c)
#Tensor(shape=[2, 2, 2], dtype=float32, place=CUDAPlace(0), stop_gradient=True,
#       [[[2.50000000, 2.50000000],
#        [2.50000000, 2.50000000]],

#       [[2.50000000, 2.50000000],
#       [2.50000000, 2.50000000]]])

[paddle-bot-old]

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[ZHUI]

LGTM