When you say build, do you mean building with scripts/build_android.sh? Or building it normally then running /scripts/build_android.sh?
I tried repeatedly running
BUILD_PYTORCH_MOBILE=1 ANDROID_ABI=arm64-v8a ./scripts/build_android.sh -DBUILD_BINARY=ON

and it now crashes with
aot_compiler.cpp:(.text._ZN5torch3jit10tensorexpr16TensorExprKernelD2Ev[_ZN5torch3jit10tensorexpr16TensorExprKernelD2Ev]+0xf8): undefined reference to `c10::UndefinedTensorImpl::_singleton'
aot_compiler.cpp:(.text._ZN5torch3jit10tensorexpr16TensorExprKernelD2Ev[_ZN5torch3jit10tensorexpr16TensorExprKernelD2Ev]+0xfc): undefined reference to `c10::UndefinedTensorImpl::_singleton'
aot_compiler.cpp:(.text._ZN5torch3jit10tensorexpr16TensorExprKernelD2Ev[_ZN5torch3jit10tensorexpr16TensorExprKernelD2Ev]+0x244): undefined reference to `torch::jit::Code::~Code()'
CMakeFiles/aot_compiler.dir/csrc/jit/mobile/nnc/aot_compiler.cpp.o: In function `torch::jit::mobile::nnc::Function::Function()':              
aot_compiler.cpp:(.text._ZN5torch3jit6mobile3nnc8FunctionC2Ev[_ZN5torch3jit6mobile3nnc8FunctionC2Ev]+0x44): undefined reference to `c10::AnyType::get()'
[ 10%] Building C object confu-deps/pytorch_qnnpack/CMakeFiles/pytorch_qnnpack.dir/src/x8zip/x3-neon.c.o                                      
[ 10%] Building C object confu-deps/pytorch_qnnpack/CMakeFiles/pytorch_qnnpack.dir/src/x8zip/x4-neon.c.o                                      
clang++: error: linker command failed with exit code 1 (use -v to see invocation)                                                             
make[2]: *** [caffe2/torch/CMakeFiles/aot_compiler.dir/build.make:84: lib/libaot_compiler.so] Error 1                                         
make[1]: *** [CMakeFiles/Makefile2:1460: caffe2/torch/CMakeFiles/aot_compiler.dir/all] Error 2                                                
make[1]: *** Waiting for unfinished jobs....