58d34e2e02
The [lldb-aarch64-windows](https://lab.llvm.org/buildbot/#/builders/141) buildbot failed with: ``` lld-link: error: undefined symbol: printf >>> referenced by main.o:(main) ``` I'm assuming that's because of the use of `__builtin_printf`. In other tests, we use `printf` form `stdio.h` and these build fine, so I added an include and used `printf`.