Avoid adding redundant public symbols by ObjCExport with caches

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/objcexport/ObjCExportCodeGenerator.kt

@@ -486,6 +486,7 @@ private fun ObjCExportCodeGenerator.replaceExternalWeakOrCommonGlobal(
             // Note: actually this is required only if global's weak/common definition is in another object file,
             // but it is simpler to do this for all globals, considering that all usages can't be removed by DCE anyway.
             context.llvm.usedGlobals += global.llvmGlobal
+            LLVMSetVisibility(global.llvmGlobal, LLVMVisibility.LLVMHiddenVisibility)
         }
     }
 }