[IR] Support user-defined equals for MFVC

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

#KT-1179

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

@@ -0,0 +1,25 @@
+@kotlin.jvm.JvmInline
+@kotlin.Metadata
+public final class IC {
+    // source: 'inlineClassEqualsOverriddenForCollections.kt'
+    private final field x: double
+    private synthetic method <init>(p0: double): void
+    public synthetic final static method box-impl(p0: double): IC
+    public static method constructor-impl(p0: double): double
+    public method equals(p0: java.lang.Object): boolean
+    public final static method equals-K5cTq2M(p0: double, p1: double): boolean
+    public static method equals-impl(p0: double, p1: java.lang.Object): boolean
+    public final static method equals-impl0(p0: double, p1: double): boolean
+    public final method getX(): double
+    public method hashCode(): int
+    public static method hashCode-impl(p0: double): int
+    public method toString(): java.lang.String
+    public static method toString-impl(p0: double): java.lang.String
+    public synthetic final method unbox-impl(): double
+}
+
+@kotlin.Metadata
+public final class InlineClassEqualsOverriddenForCollectionsKt {
+    // source: 'inlineClassEqualsOverriddenForCollections.kt'
+    public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
+}