Rename __assert to __assert_fail

This makes relibc more compatible with other libc implementations
4 jobs from assert_fail in 16 minutes and 54 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Build
passed #13572
build:linux

00:07:29

passed #13573
build:redox

00:09:26

 
  Test
failed #13575
allowed to fail
fmt

00:02:41

passed #13574
test:linux

00:07:28

 
Name Stage Failure
failed
fmt Test
                         data: 0,
},
) as c_int
- },
+ }
_ => {
unsafe { platform::errno = EINVAL };
return -1;
ERROR: Job failed: exit code 1