Since aedeb8d557, which switched to EPC-based eh-frame registration, the
eh-frame registration functions need to be forcibly linked into the target
process.
We need a general solution to this problem, but for now just force it in this
example to fix the test failures in
https://green.lab.llvm.org/green/job/clang-stage1-RA/31497
rdar://101083784