stage2 x86_64: fix incorrect comment in genX8664BinMath
stage2 x86_64: fix incorrect comment in genX8664BinMath

Co-authored-by: joachimschmidt557 <5c744fdfb17bd1ed962f6eb9f7498a16e59a7c44@outlook.com>

zig-lang/zig,andrewrk/zig,zig-lang/zig,zig-lang/zig,andrewrk/zig