Created by: sfraczek

Introduce MKLDNN fuse pass (designed especially for Ernie) named reshape_transpose_matmul_mkldnn_fuse_pass. It fusses reshape and transpose operations in the inputs of matmul into the matmul operator itself.

To acheive this it adds 4 new attributes to matmul_op.

• fused_transpose_X,
• fused_transpose_Y,
• fused_reshape_X,
• fused_reshape_Y.