Use --allow-shlib-undefined linker flag

...for android.hardware.neuralnetworks-shim-service-sample.

neuralnetworks_sample_sl_driver_prebuilt has undefined symbols that
cause an error when building with upstream lld (aosp/2036867)

Bug: http://b/197965342
Test: cherry-pick aosp/2036867 and do: mmma packages/modules/NeuralNetworks
Change-Id: I2ba47be5caf4e361cfa494bffe8dfefb349904a0
1 file changed