Add @JvmStatic Intention: Support functions/properties in objects

Also eliminate unnecessary object instance references on Java call sites

 #KT-20095 Fixed

idea/testData/multiFileIntentions/addJvmStaticToCompanionObjectFun/before/test/test.kt

@@ -0,0 +1,7 @@
+package test
+
+class C {
+    companion object {
+        fun <caret>foo(s: String) {}
+    }
+}