BidirectionalSequenceLSTM op: Fixes VTS test for merge_outputs

Bug: 123644584

Test: VtsHalNeuralnetworksV1_xTargetTest
Change-Id: I8829fd47094ca4af05e5d60da917499ce61acc5e
Merged-In: I8829fd47094ca4af05e5d60da917499ce61acc5e
(cherry picked from commit a8f33f7dbff1c3ad0cb01b7f9214b8bf49eaa992)
1 file changed