jvm-abi-gen: Add test to check the declaration order in interface jars

plugins/jvm-abi-gen/testData/content/kt50005/directives.txt

@@ -0,0 +1,2 @@
+// IGNORE_BACKEND_LEGACY: JVM
+// IGNORE_BACKEND: JVM

plugins/jvm-abi-gen/testData/content/kt50005/signatures.txt

@@ -0,0 +1,12 @@
+@kotlin.Metadata
+public final class test/A {
+    // source: 'test.kt'
+    public final @kotlin.jvm.JvmField field b: int
+    public field a: java.lang.String
+    public method <init>(): void
+    public final @org.jetbrains.annotations.NotNull method getA(): java.lang.String
+    public final method setA(@org.jetbrains.annotations.NotNull p0: java.lang.String): void
+    public final method g(): void
+    public final method f(): void
+    public final method h(): void
+}

plugins/jvm-abi-gen/testData/content/kt50005/test.kt

@@ -0,0 +1,14 @@
+package test
+
+// The order of fields and methods is visible to annotation processors
+// and thus part of the public ABI of a library.
+class A {
+    @JvmField
+    val b: Int = 0
+    lateinit var a: String
+
+    fun g() {}
+    fun f() {}
+    fun h() {}
+}
+