[Wasm] Fix external functions import clashing

compiler/testData/codegen/boxWasmJsInterop/nameClash.kt

@@ -0,0 +1,21 @@
+// IGNORE_BACKEND: JS_IR, JS
+// FILE: file1.kt
+@JsFun("() => 42")
+private external fun clashName(): Int
+
+public fun getClashName1(): Int = clashName()
+
+// FILE: file2.kt
+@JsFun("() => 24")
+private external fun clashName(): Int
+
+public fun getClashName2(): Int = clashName()
+
+fun box(): String {
+
+    if (getClashName1() != 42) return "Error1"
+    if (getClashName2() != 24) return "Error2"
+
+
+    return "OK"
+}