Make inline+reified functions synthetic instead of private in bytecode

#KT-18563 Fixed

compiler/testData/codegen/bytecodeListing/inline/inlineReified.txt

@@ -2,11 +2,11 @@
 public final class Foo {
     public method <init>(): void
     public final method bar(): void
-    private final method baz(): void
+    public synthetic final method baz(): void
 }
 
 @kotlin.Metadata
 public final class InlineReifiedKt {
     public final static method bar(): void
-    private final static method baz(): void
+    public synthetic final static method baz(): void
 }