reading varargs

generics do not work yet:

===
fun <P> varargGeneric(a: Int, vararg b: P) = 1
===

compiler/testData/readClass/fun/FunVarargCharSequence.kt

@@ -0,0 +1,3 @@
+namespace test
+
+fun varargCharSequence(a: Int, vararg b: java.lang.CharSequence) = 1

compiler/testData/readClass/fun/FunVarargInt.kt

@@ -0,0 +1,3 @@
+namespace test
+
+fun varargInt(a: Int, vararg b: Int) = 1