Rollup merge of #97843 - overdrivenpotato:psp-lto, r=michaelwoerister

Rollup merge of #97843 - overdrivenpotato:psp-lto, r=michaelwoerister

Relax mipsel-sony-psp's linker script

Previously, the linker script forcefully kept all `.lib.stub` sections, unnecessarily bloating the binary. Now, the script is LTO and `--gc-sections` friendly.

`--nmagic` was also added to the linker, because page alignment is not required on the PSP. This further reduces binary size.

Accompanying changes for the `psp` crate are found in: https://github.com/overdrivenpotato/rust-psp/pull/118