Remove LD_LIBRARY_PATH from test/run_unit_test.sh

  binary="/data/nativetest/${name}/${name}"

  push_command=( "${adb[@]}" push {"${ANDROID_PRODUCT_OUT}",}"${binary}" )

  test_command=( "${adb[@]}" shell "LD_LIBRARY_PATH=/system/lib/hw:$LD_LIBRARY_PATH ${binary}" )

  test_command=( "${adb[@]}" shell "${binary}" )

  if [ "${name}" != "${spec}" ]; then

    filter="${spec#*.}"

    test_command+=( "--gtest_filter=${filter}" )