Iniital implementation of synthetic extensions for SAM-adapter functions (non-static only)

compiler/testData/diagnostics/tests/syntheticExtensions/samAdapters/GenericMethodInGenericClass.kt

@@ -0,0 +1,13 @@
+// FILE: KotlinFile.kt
+fun foo(javaClass: JavaClass<Int>): String {
+    return javaClass.doSomething("", 1) { it }
+}
+
+// FILE: JavaClass.java
+public class JavaClass<X> {
+    public <T> T doSomething(T t, X x, I<T> i) { return i.run(t); }
+}
+
+interface I<T> {
+    T run(T t);
+}