IC mangling: Use old mangling scheme for stdlib

This way, new stdlib can still be usable in 1.4.20

compiler/testData/codegen/bytecodeListing/inlineClasses/stdlibManglingIn1430/new.kt

@@ -0,0 +1,5 @@
+package test
+
+inline class IC(val i: Int)
+
+fun foo(i: Int, ic: IC) {}

compiler/testData/codegen/bytecodeListing/inlineClasses/stdlibManglingIn1430/new.txt

@@ -0,0 +1,23 @@
+@kotlin.Metadata
+public final class test/IC {
+    // source: 'new.kt'
+    private final field i: int
+    private synthetic method <init>(p0: int): void
+    public synthetic final static method box-impl(p0: int): test.IC
+    public static method constructor-impl(p0: int): int
+    public method equals(p0: java.lang.Object): boolean
+    public static method equals-impl(p0: int, p1: java.lang.Object): boolean
+    public final static method equals-impl0(p0: int, p1: int): boolean
+    public final method getI(): int
+    public method hashCode(): int
+    public static method hashCode-impl(p0: int): int
+    public method toString(): java.lang.String
+    public static method toString-impl(p0: int): java.lang.String
+    public synthetic final method unbox-impl(): int
+}
+
+@kotlin.Metadata
+public final class test/NewKt {
+    // source: 'new.kt'
+    public final static method foo-WsYm_fY(p0: int, p1: int): void
+}

compiler/testData/codegen/bytecodeListing/inlineClasses/stdlibManglingIn1430/old.kt

@@ -0,0 +1,11 @@
+// FILE: 1.kt
+package test
+
+inline class IC(val i: Int)
+
+// FILE: 2.kt
+package kotlin
+
+import test.*
+
+fun foo(i: Int, ic: IC) {}

compiler/testData/codegen/bytecodeListing/inlineClasses/stdlibManglingIn1430/old.txt

@@ -0,0 +1,23 @@
+@kotlin.Metadata
+public final class kotlin/_2Kt {
+    // source: '2.kt'
+    public final static method foo-wfSZ3cc(p0: int, p1: int): void
+}
+
+@kotlin.Metadata
+public final class test/IC {
+    // source: '1.kt'
+    private final field i: int
+    private synthetic method <init>(p0: int): void
+    public synthetic final static method box-impl(p0: int): test.IC
+    public static method constructor-impl(p0: int): int
+    public method equals(p0: java.lang.Object): boolean
+    public static method equals-impl(p0: int, p1: java.lang.Object): boolean
+    public final static method equals-impl0(p0: int, p1: int): boolean
+    public final method getI(): int
+    public method hashCode(): int
+    public static method hashCode-impl(p0: int): int
+    public method toString(): java.lang.String
+    public static method toString-impl(p0: int): java.lang.String
+    public synthetic final method unbox-impl(): int
+}