[llvm] Fix ORCv2 C Binding

[leifhelm]

Summary

The LLVMOrcObjectLayerAddObjectFileWithRT method does not have an implementation. LLVMOrcLLJITAddObjectFileWithRT exists twice (maybe a copy paste error).

[lattner]

@lhames would be the best reviewer for this.

[lhames]

LGTM. Thanks Jakob!

What name / email would you like me to use for the patch attribution?

[leifhelm]

Thanks for reviewing this.
Use Jakob Leifhelm and [e-mail] for the attribution.

llvm/lib/ExecutionEngine/Orc/OrcV2CBindings.cpp

 
 LLVMErrorRef LLVMOrcObjectLayerAddObjectFile(LLVMOrcObjectLayerRef ObjLayer,
                                              LLVMOrcJITDylibRef JD,
                                              LLVMMemoryBufferRef ObjBuffer) {
   return wrap(unwrap(ObjLayer)->add(
       *unwrap(JD), std::unique_ptr<MemoryBuffer>(unwrap(ObjBuffer))));
 }
 
-LLVMErrorRef LLVMOrcLLJITAddObjectFileWithRT(LLVMOrcObjectLayerRef ObjLayer,
+LLVMErrorRef LLVMOrcObjectLayerAddObjectFileWithRT(LLVMOrcObjectLayerRef ObjLayer,
                                                    LLVMOrcResourceTrackerRef RT,
                                                    LLVMMemoryBufferRef ObjBuffer) {
   return wrap(
       unwrap(ObjLayer)->add(ResourceTrackerSP(unwrap(RT)),
                             std::unique_ptr<MemoryBuffer>(unwrap(ObjBuffer))));
 }
 
 void LLVMOrcObjectLayerEmit(LLVMOrcObjectLayerRef ObjLayer,
                             LLVMOrcMaterializationResponsibilityRef R,
                             LLVMMemoryBufferRef ObjBuffer) {