[FIR TEST] Add problematic CFG test

compiler/fir/analysis-tests/testData/resolve/problems/secondaryConstructorCfg.kt

@@ -0,0 +1,13 @@
+// !DUMP_CFG
+class B(p0: String) {
+    val p1 = p0
+    val p2: Int = p0.length
+    var p3: String
+    constructor(p0: String, p1: String) : this(p0) {
+        p3 = p1
+    }
+    init {
+        p1 = p0.length
+        p3 = ""
+    }
+}