[codegen] Fix one more case where `getGlobalDecl` should be used. NFC.

- After https://reviews.llvm.org/D68578, the implicit conversion from
  `FunctionDecl` to `GlobalDecl` needs replacing with `getGlobalDecl`;
  otherwise, assertion is triggered.

clang/lib/CodeGen/CGDebugInfo.cpp

@@ -3833,7 +3833,8 @@ void CGDebugInfo::EmitFuncDeclForCallSite(llvm::CallBase *CallOrInvoke,
   // create the one describing the function in order to have complete
   // call site debug info.
   if (!CalleeDecl->isStatic() && !CalleeDecl->isInlined())
-    EmitFunctionDecl(CalleeDecl, CalleeDecl->getLocation(), CalleeType, Func);
+    EmitFunctionDecl(CGM.getGlobalDecl(CalleeDecl), CalleeDecl->getLocation(),
+                     CalleeType, Func);
 }
 
 void CGDebugInfo::EmitInlineFunctionStart(CGBuilderTy &Builder, GlobalDecl GD) {