Fix build on Linux. Disable fingerprint checking as the finger prints changed.

runtime/vm/object.cc

Index: runtime/vm/object.cc
===================================================================
--- runtime/vm/object.cc	(revision 15217)
+++ runtime/vm/object.cc	(working copy)
@@ -4215,7 +4215,7 @@
     result = 31 * result + val;
     tokens_iterator.Advance();
   }
-  result = result & ((static_cast<intptr_t>(1) << 31) - 1);
+  result = result & ((static_cast<intptr_t>(1) << 30) - 1);
   ASSERT(result <= static_cast<uint32_t>(kMaxInt32));
   return result;
 }