Ensure that aarch64-builtins.o gets linked
Needed to partially unbreak the redox prefix toolchain build for AArch64.
There are some further unrelated relibc fixes needed for the toolchain to build completely.
That's being addressed separately.
Needed to partially unbreak the redox prefix toolchain build for AArch64.
There are some further unrelated relibc fixes needed for the toolchain to build completely.
That's being addressed separately.