Fix JVM signatures involving multi-dimensional array types

Apparently ASM's Type#getElementType returns the type of the array even if it's
multi-dimensional, so the loop was incorrect

compiler/testData/codegen/boxWithStdlib/reflection/properties/propertyOfNestedClassAndArrayType.kt

@@ -0,0 +1,16 @@
+class A {
+    class B(val result: String)
+
+    var p: A.B? = null
+    var q: Array<Array<A.B>>? = null
+}
+
+fun box(): String {
+    val a = A()
+
+    (A::q).set(a, array(array(A.B("array"))))
+    if (a.q!![0][0].result != "array") return "Fail array"
+
+    (A::p).set(a, A.B("OK"))
+    return a.p!!.result
+}

compiler/testData/loadJava/compiledKotlin/annotations/MultiDimensionalArrayMethod.kt

@@ -0,0 +1,12 @@
+//ALLOW_AST_ACCESS
+package test
+
+annotation class Anno(val s: String)
+
+trait T {
+    Anno("foo")
+    fun foo(): Array<Array<Array<T>>>
+
+    Anno("bar")
+    val bar: Array<Array<BooleanArray>>
+}

compiler/testData/loadJava/compiledKotlin/annotations/MultiDimensionalArrayMethod.txt

@@ -0,0 +1,13 @@
+package test
+
+internal final annotation class Anno : kotlin.Annotation {
+    /*primary*/ public constructor Anno(/*0*/ s: kotlin.String)
+    internal final val s: kotlin.String
+        internal final fun <get-s>(): kotlin.String
+}
+
+internal trait T {
+    test.Anno(s = "bar": kotlin.String) internal abstract val bar: kotlin.Array<kotlin.Array<kotlin.BooleanArray>>
+        internal abstract fun <get-bar>(): kotlin.Array<kotlin.Array<kotlin.BooleanArray>>
+    test.Anno(s = "foo": kotlin.String) internal abstract fun foo(): kotlin.Array<kotlin.Array<kotlin.Array<test.T>>>
+}