Special case Golang newtype that ends in Ptr.
Special case Golang newtype that ends in Ptr.

Summary:
Special case Golang newtypes that end in Ptr, that would cause a redecleration
error without the special case.

Reviewed By: fiorix

Differential Revision: D10349407

fbshipit-source-id: 996b46c3c31cc776302e6b6b5024b90078abbd8c

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