[K/N] Introduce api for getting existing global by name from StaticData

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/StaticData.kt

@@ -51,6 +51,11 @@ internal class StaticData(override val context: Context): ContextUtils {
                 val llvmGlobal = createLlvmGlobal(module!!, type, name, isExported)
                 return Global(staticData, llvmGlobal)
             }
+
+            fun get(staticData: StaticData, name: String): Global? {
+                val llvmGlobal = LLVMGetNamedGlobal(staticData.context.llvmModule, name) ?: return null
+                return Global(staticData, llvmGlobal)
+            }
         }
 
         val type get() = getGlobalType(this.llvmGlobal)
@@ -147,6 +152,10 @@ internal class StaticData(override val context: Context): ContextUtils {
         return global
     }
 
+    fun getGlobal(name: String): Global? {
+        return Global.get(this, name)
+    }
+
     /**
      * Creates array-typed global with given name and value.
      */