[libclang][deps] Fix build after removal of ModuleIDHasher

We can now use a DenseMap instead.

rdar://99151069

Author: benlangmuir

clang/tools/libclang/CDependencies.cpp

@@ -188,7 +188,7 @@ class OutputLookup {
   std::string lookupModuleOutput(const ModuleID &ID, ModuleOutputKind MOK);
 
 private:
-  std::unordered_map<ModuleID, std::string, ModuleIDHasher> PCMPaths;
+  llvm::DenseMap<ModuleID, std::string> PCMPaths;
   void *MLOContext;
   CXModuleLookupOutputCallback *MLO;
 };