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/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>>>
+}