Ensure the rtld for aarch64 is built with -mgeneral-regs-only to prevent the compiler from generating SIMD instructions. This guarantees that volatile SIMD registers (q16-q31) are not clobbered during lazy symbol binding. Without this, symbol binding operations could corrupt application state, especially during signal delivery or context switches.
This resolves a potential source of failure in tests like xregs_sig, as seen in bug 271730.