Update Buildroot to 2019.02.3 (#415)

* Update Buildroot to 2019-02.3

* Fix enter script

* Update ova_defconfig

* Fix network manager

* Remove runc patches

* Use same docker version

* Fix build

* Fix vmtools

* Fix depens

* Fix handling with tempfiles

* Fix permission handling

* Fix cp

* Cleanup

* Fix mounts

buildroot/support/testing/tests/package/sample_python_subprocess32.py

@@ -0,0 +1,6 @@
+import subprocess32
+
+output = subprocess32.check_output(["ls", "-l", "/dev/null"])
+print(output)
+assert("/dev/null" in output)
+assert("No such" not in output)