Calls to Java's primitive class methods work.

Calls to Java's primitive classes that had the same name as the
corresponding primitive in Kotlin didn't work. Now calls like
Short.valueOf() is turned to java.lang.Short.valueOf() in Kotlin.

tests/testData/ast/boxedType/file/kt-671.jav

@@ -3,6 +3,7 @@ package demo;
 class Test {
   void test() {
     Integer i = Integer.valueOf(100);
-    Short s = Short.valueOf(100);
+    short s = 3;
+    Short ss = Short.valueOf(s);
   }
 }

tests/testData/ast/boxedType/file/kt-671.kt

@@ -2,6 +2,7 @@ package demo
 open class Test() {
 open fun test() : Unit {
 var i : Int? = Integer.valueOf(100)
-var s : Short? = Short.valueOf(100)
+var s : Short = 3
+var ss : Short? = java.lang.Short.valueOf(s)
 }
 }