[ORC] Fix examples after cd585864c0b.

cd585864c0b added a MemoryBuffer argument to the memory manager factory. This
patch updates the examples to reflect that change.

llvm/examples/OrcV2Examples/LLJITWithGDBRegistrationListener/LLJITWithGDBRegistrationListener.cpp

@@ -63,7 +63,7 @@ int main(int argc, char *argv[]) {
       ExitOnErr(LLJITBuilder()
                     .setJITTargetMachineBuilder(std::move(JTMB))
                     .setObjectLinkingLayerCreator([&](ExecutionSession &ES) {
-                      auto GetMemMgr = []() {
+                      auto GetMemMgr = [](const MemoryBuffer &) {
                         return std::make_unique<SectionMemoryManager>();
                       };
                       auto ObjLinkingLayer =

llvm/examples/SpeculativeJIT/SpeculativeJIT.cpp

@@ -125,7 +125,8 @@ private:
     ExitOnErr(CXXRuntimeoverrides.enable(MainJD, Mangle));
   }
 
-  static std::unique_ptr<SectionMemoryManager> createMemMgr() {
+  static std::unique_ptr<SectionMemoryManager>
+  createMemMgr(const MemoryBuffer &) {
     return std::make_unique<SectionMemoryManager>();
   }