Post-review fixes, added support for octal escaping definition for char

j2k/testData/fileOrElement/literalExpression/charOctal.java

@@ -0,0 +1,7 @@
+public class A {
+    public char a = '\77';
+    public char b = '\111';
+    public char c = '\377';
+    public char d = '\000';
+    public char f = '\0';
+}

j2k/testData/fileOrElement/literalExpression/charOctal.kt

@@ -0,0 +1,7 @@
+class A {
+    var a = '\u003f'
+    var b = '\u0049'
+    var c = '\u00ff'
+    var d = '\u0000'
+    var f = '\u0000'
+}