Resolves everything actually discussed in #31421.
pubfnmain()void{}$ zig-0.15.2 build-exe main.zig -OReleaseSmall -fsingle-threaded -femit-bin=main-0.15.2
$ zig-master build-exe main.zig -OReleaseSmall -fsingle-threaded -femit-bin=main-master
$ zig-branch build-exe main.zig -OReleaseSmall -fsingle-threaded -femit-bin=main-branch
$ wc -c main-*
1824 main-0.15.2
5080 main-master
1640 main-branch
Resolves everything *actually* discussed in #31421.
```zig
pub fn main() void {}
```
```console
$ zig-0.15.2 build-exe main.zig -OReleaseSmall -fsingle-threaded -femit-bin=main-0.15.2
$ zig-master build-exe main.zig -OReleaseSmall -fsingle-threaded -femit-bin=main-master
$ zig-branch build-exe main.zig -OReleaseSmall -fsingle-threaded -femit-bin=main-branch
$ wc -c main-*
1824 main-0.15.2
5080 main-master
1640 main-branch
```