Add support for initializing static fields.

Change-Id: I1c5397e9ef03f4cef1646fa833e17d64fc586dce
diff --git a/src/class_linker.h b/src/class_linker.h
index 2021705..fec3cb1 100644
--- a/src/class_linker.h
+++ b/src/class_linker.h
@@ -29,7 +29,9 @@
 
   Class* LookupClass(const char* descriptor, Object* class_loader);
 
-  Class* ResolveClass(Class* klass, uint32_t idx);
+  Class* ResolveClass(const Class* referring, uint32_t class_idx);
+
+  String* ResolveString(const Class* referring, uint32_t string_idx);
 
   DexFile* FindInClassPath(const char* descriptor);