patch to compile _devicearray.cpp with c++11
patch to compile _devicearray.cpp with c++11

On OSX this resolves:

```
[2021-02-05 04:26:34,227] {bash_operator.py:132} INFO - 1 warning and 3 errors generated.
[2021-02-05 04:26:34,227] {bash_operator.py:132} INFO - numba/_devicearray.cpp:100:19: error: use of undeclared identifier 'nullptr'
[2021-02-05 04:26:34,227] {bash_operator.py:132} INFO -     PyObject *m = nullptr;
[2021-02-05 04:26:34,227] {bash_operator.py:132} INFO -                   ^
[2021-02-05 04:26:34,227] {bash_operator.py:132} INFO - numba/_devicearray.cpp:101:19: error: use of undeclared identifier 'nullptr'
[2021-02-05 04:26:34,227] {bash_operator.py:132} INFO -     PyObject *d = nullptr;
[2021-02-05 04:26:34,227] {bash_operator.py:132} INFO -                   ^
[2021-02-05 04:26:34,227] {bash_operator.py:132} INFO - numba/_devicearray.cpp:102:23: error: use of undeclared identifier 'nullptr'
[2021-02-05 04:26:34,227] {bash_operator.py:132} INFO -     PyObject *c_api = nullptr;
[2021-02-05 04:26:34,227] {bash_operator.py:132} INFO -                       ^
[2021-02-05 04:26:34,227] {bash_operator.py:132} INFO - numba/_devicearray.cpp:20:5: warning: private field 'ob_base' is not used [-Wunused-private-field]
[2021-02-05 04:26:34,227] {bash_operator.py:132} INFO -     PyObject_HEAD
[2021-02-05 04:26:34,227] {bash_operator.py:132} INFO -     ^
[2021-02-05 04:26:34,228] {bash_operator.py:132} INFO - /Users/ci/miniconda3/envs/testenv_96344ff4-013b-4e58-856d-c4b7bb365115/include/python3.6m/object.h:83:50: note: expanded from macro 'PyObject_HEAD'
[2021-02-05 04:26:34,228] {bash_operator.py:132} INFO - #define PyObject_HEAD                   PyObject ob_base;
[2021-02-05 04:26:34,228] {bash_operator.py:132} INFO -                                                  ^
[2021-02-05 04:26:34,228] {bash_operator.py:132} INFO - 1 warning and 3 errors generated.
```

seibert/numba,cpcloud/numba,IntelLabs/numba,seibert/numba,IntelLabs/numba,cpcloud/numba,cpcloud/numba,stuartarchibald/numba,IntelLabs/numba,numba/numba,numba/numba,numba/numba,stonebig/numba,cpcloud/numba,stonebig/numba,gmarkall/numba,stuartarchibald/numba,stonebig/numba,stuartarchibald/numba,stuartarchibald/numba,seibert/numba,seibert/numba,cpcloud/numba,IntelLabs/numba,numba/numba,stonebig/numba,gmarkall/numba,gmarkall/numba,seibert/numba,stuartarchibald/numba,stonebig/numba,numba/numba,IntelLabs/numba,gmarkall/numba,gmarkall/numba