Import cudart symbols properly

[leofang]

Currently I hand-modify this, but we should be able to autogen it.

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[leofang]

/ok to test

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[vzhurba01]

I can apply the fix in autogen and push a commit to this PR.

[vzhurba01]

I'll need https://github.com/NVIDIA/cuda-python/pull/544 to be merged first for this to be a clean commit though.

[leofang]

This is done as part of #597. Thanks, @vzhurba01!