swift

efd5c1ec - SIL: Move the implementation of `Lowering::usesObjCAllocator()` to the SIL library.

SIL: Move the implementation of `Lowering::usesObjCAllocator()` to the SIL library. The definition of `Lowering::usesObjCAllocator()` was previously implemented in SILGen, which does not match the library membership of the declaration. The implementation of `SILSymbolVisitor` in the SIL library uses this and since SIL is a dependency of SILGen instead of vice-versa this resulted in a linker error.