Add test on bytecode text

Test data should be a Kotlin source file with zero or more comments e.g. of
the form: '// 1 INVOKEVIRTUAL'. The test then checks that the generated
bytecode for this file contains exactly one occurrence of the string
'INVOKEVIRTUAL'

compiler/testData/codegen/bytecodeText/kt2202.kt

@@ -0,0 +1,21 @@
+// KT-2202 Wrong instruction for invoke private setter
+
+class A {
+    private fun f1() {}
+
+    fun foo() {
+        f1()
+    }
+}
+
+class B {
+    var foo = 1
+        private set
+
+    fun foo() {
+       foo = 2
+    }
+}
+
+// 0 INVOKEVIRTUAL
+// 4 INVOKESPECIAL