Tensorflow 1.13.1 for aarch64/arm64

Tensorflow 1.13.1 for aarch64/arm64

Built on Ubuntu Xenial on Galaxy S10+ running Linux on DeX using GCC 5.4.0 with Python 3.5, using this bazel build:
https://github.com/dilbrent/bazel/releases/tag/0.21.0.arm_aarch64

Had to make one minor tweak to support AWS-friendly build on aarch64, otherwise this is identical to the official tensorflow 1.13.1 build tree.