[IR] Support user-defined equals for MFVC

Signed-off-by: Evgeniy.Zhelenskiy <Evgeniy.Zhelenskiy@jetbrains.com>

#KT-1179

compiler/testData/codegen/box/inlineClasses/inlineClassHashCodeOverride.txt

@@ -0,0 +1,31 @@
+@kotlin.jvm.JvmInline
+@kotlin.Metadata
+public final class A {
+    // source: 'inlineClassHashCodeOverride.kt'
+    private final @org.jetbrains.annotations.NotNull field value: MyClass
+    private synthetic method <init>(p0: MyClass): void
+    public synthetic final static method box-impl(p0: MyClass): A
+    public static @org.jetbrains.annotations.NotNull method constructor-impl(@org.jetbrains.annotations.NotNull p0: MyClass): MyClass
+    public method equals(p0: java.lang.Object): boolean
+    public static method equals-impl(p0: MyClass, p1: java.lang.Object): boolean
+    public final static method equals-impl0(p0: MyClass, p1: MyClass): boolean
+    public final @org.jetbrains.annotations.NotNull method getValue(): MyClass
+    public method hashCode(): int
+    public static method hashCode-impl(p0: MyClass): int
+    public method toString(): java.lang.String
+    public static method toString-impl(p0: MyClass): java.lang.String
+    public synthetic final method unbox-impl(): MyClass
+}
+
+@kotlin.Metadata
+public final class InlineClassHashCodeOverrideKt {
+    // source: 'inlineClassHashCodeOverride.kt'
+    public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
+}
+
+@kotlin.Metadata
+public final class MyClass {
+    // source: 'inlineClassHashCodeOverride.kt'
+    public method <init>(): void
+    public method hashCode(): int
+}