_offc_strlit.nx

Reduced repro for T#selfhost-003: uses a string literal so the compiler must emit `la <reg>, .Lg<id>` and a `.Lg<id>: .asciz`. If nxc.elf compiles this correctly, basic VK_GLOBAL machinery works and the self-host crash is scale-related (asm buffer overflow, many-globals interaction with another pass, etc.).