Replace occurences of uninitialized with MaybeUninit

mem::uninitialized is deprecated, so move over the not-UB MaybeUninit.
5 jobs for no-uninit in 8 minutes and 2 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Build
passed #21637
build:linux

00:01:26

passed #21638
build:redox

00:01:03

 
  Test
failed #21641
allowed to fail
fmt

00:01:01

passed #21639
test:linux

00:01:00

passed #21640
test:redox

00:06:35

 
Name Stage Failure
failed
fmt Test
-use crate::platform::{Pal, Sys};
+use crate::{
+ header::sys_time::timeval,
+ platform::{types::*, Pal, Sys},
+};

// Exported in bits file
// const RUSAGE_SELF: c_int = 0;
ERROR: Job failed: exit code 1