make ucm/event/event.h installed

[skypexu]

It would be nice to install ucm/event/event.h when make install, this would allow us to unregister memory when we do know that
the memory is released.

[yosefe]

it can be done by following API in ucm.h:

/**
 * @brief Call the handlers registered for aggregated VM_MUNMAP event.
 */
void ucm_vm_munmap(void *addr, size_t length);

[skypexu]

it can be done by following API in ucm.h:

/**
 * @brief Call the handlers registered for aggregated VM_MUNMAP event.
 */
void ucm_vm_munmap(void *addr, size_t length);

but the memory is not allocated by mmap, it is from third party library.

[yosefe]

but the memory is not allocated by mmap, it is from third party library.

it doesn't matter; Calling this function with dispatch memory release event to all consumers.

[skypexu]

OK, I found the API, thanks!