[x86/Linux] Fix mismatch over LPOVERLAPPED_COMPLETION_ROUTINE (#8364)
* Fix the mismatch over LPOVERLAPPED_COMPLETION_ROUTINE
Those functions are compared with Function variable of
LPOVERLAPPED_COMPLETION_ROUTINE type, but has inconsistent type,
- WaitIOCompletionCallback,
- CallbackForInitiateDrainageOfCompletionPortQueue
- CallbackForContinueDrainageOfCompletionPortQueue
This inconsistency results in compile error for x86/Linux build.
This commit fixes such inconsistency.
* Revises 'CallbackForContinueDrainageOfCompletionPortQueue'