[JVM IR] Ensure there is one accessor for each super access from a

subclass when there are multiple subclasses in a file.

compiler/testData/codegen/boxInline/syntheticAccessors/superCallFromMultipleSubclasses.kt

@@ -0,0 +1,27 @@
+// FILE: 1.kt
+
+package test
+
+open class A {
+    open fun test(s: String) = s
+}
+
+object B : A() {
+    override fun test(s: String) = "fail"
+
+    inline fun doTest(s: String) = super.test(s)
+}
+
+object C : A() {
+    override fun test(s: String) = "fail"
+
+    inline fun doTest(s: String) = super.test(s)
+}
+
+// FILE: 2.kt
+
+import test.*
+
+fun box(): String {
+    return B.doTest("O") + C.doTest("K")
+}