mock wait4 on android using waitpid like on win32 #752
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Right now Lwt_process fails when using Android NDK because
wait4
isn't available on every Android device. To solve it this PR implements the same behavior as on win32 it just useswaitpid
and fills therusage
with a mock.This is important because esy does use Lwt_process and it fails without this patch to work when using an Android device