Kapt3: Put static modifiers on nested non-inner classes.

Do not initialize synthetic and static fields in constructor.

plugins/kapt3/testData/runner/Simple.java

@@ -9,4 +9,19 @@ class Simple {
 
 @interface MyAnnotation {
 
+}
+
+enum EnumClass {
+    BLACK, WHITE
+}
+
+
+enum EnumClass2 {
+    WHITE("A"), RED("B");
+
+    private final String blah;
+
+    EnumClass2(String blah) {
+        this.blah = blah;
+    }
 }