Minor. Add more tests

compiler/testData/codegen/box/inlineClasses/inlineClassWithCustomEqualsGeneric.kt

@@ -0,0 +1,22 @@
+// IGNORE_BACKEND_FIR: JVM_IR
+// FIR status: not supported in JVM
+// IGNORE_BACKEND: JVM
+// IGNORE_BACKEND: JVM_IR
+// WITH_STDLIB
+// WORKS_WHEN_VALUE_CLASS
+// LANGUAGE: +ValueClasses, +GenericInlineClassParameter
+
+@file:Suppress("RESERVED_MEMBER_INSIDE_VALUE_CLASS")
+
+OPTIONAL_JVM_INLINE_ANNOTATION
+value class Z<T: Int>(val data: T) {
+    override fun equals(other: Any?): Boolean =
+        other is Z<T> `&&`
+                data % 256 == other.data % 256
+}
+
+fun box(): String {
+    if (Z(0) != Z(256)) throw AssertionError()
+
+    return "OK"
+}