Move SAM adapters from static scope to synthetic one

compiler/testData/loadJava/compiledJava/sam/FakeStaticOverrides.java

@@ -0,0 +1,18 @@
+package test;
+
+import kotlin.Unit;
+import kotlin.jvm.functions.Function0;
+
+public final class FakeStaticOverrides {
+    public static class A {
+        static public void foo(Function0<Unit> x) {}
+    }
+
+    public static class B extends A {
+        // SAM adapter should not override A.foo
+        static public void foo(Runnable x) {}
+    }
+
+    public static class C extends B {
+    }
+}