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

compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/Getter.kt

@@ -0,0 +1,20 @@
+// FILE: KotlinFile.kt
+class KotlinClass {
+    public fun getSomething(): Int = 1
+}
+
+fun foo(javaClass: JavaClass, kotlinClass: KotlinClass) {
+    useInt(javaClass.getSomething())
+    useInt(javaClass.something)
+    <!VAL_REASSIGNMENT!>javaClass.something<!> = 1
+    javaClass.<!UNRESOLVED_REFERENCE!>Something<!>
+    useInt(kotlinClass.getSomething())
+    kotlinClass.<!UNRESOLVED_REFERENCE!>something<!>
+}
+
+fun useInt(<!UNUSED_PARAMETER!>i<!>: Int) {}
+
+// FILE: JavaClass.java
+public class JavaClass {
+    public int getSomething() { return 1; }
+}