Darwin/aarch64: Account for long double being equal to double
Darwin/aarch64: Account for long double being equal to double

nmav/libffi,biosbits/libffi,joshtriplett/libffi,joshtriplett/libffi,rth7680/libffi,biosbits/libffi,johne53/MB3Libffi,Pan7/libffi,Distrotech/libffi,nmav/libffi,plicease/libffi,rth7680/libffi,nmav/libffi,Distrotech/libffi,joshtriplett/libffi,bgarrels/libffi,plicease/libffi,bgarrels/libffi,johne53/MB3Libffi,Pan7/libffi,s1341/libffi,joshtriplett/libffi,rth7680/libffi,johne53/MB3Libffi,s1341/libffi,nmav/libffi,biosbits/libffi,Distrotech/libffi,s1341/libffi,plicease/libffi,Pan7/libffi,biosbits/libffi,Distrotech/libffi,Pan7/libffi,bgarrels/libffi,bgarrels/libffi,johne53/MB3Libffi,rth7680/libffi,plicease/libffi,johne53/MB3Libffi,s1341/libffi