Use assembly instead of C array literals to link the core snapshot into the VM.

runtime/bin/snapshot_empty.cc

Index: runtime/bin/snapshot_empty.cc
diff --git a/runtime/bin/snapshot_empty.cc b/runtime/bin/snapshot_empty.cc
index 6508bd92d837f2ab138a1e2e972984b9dd9bd3fb..6629e07d450973eb53f52e467a8e45516c43e0d5 100644
--- a/runtime/bin/snapshot_empty.cc
+++ b/runtime/bin/snapshot_empty.cc
@@ -13,13 +13,9 @@ typedef unsigned __int8 uint8_t;
 #endif
 #include <stddef.h>
 
-namespace dart {
-namespace bin {
-
-const uint8_t* vm_snapshot_data = NULL;
-const uint8_t* vm_snapshot_instructions = NULL;
-const uint8_t* core_isolate_snapshot_data = NULL;
-const uint8_t* core_isolate_snapshot_instructions = NULL;
-
-}  // namespace bin
-}  // namespace dart
+extern "C" {
+const uint8_t* kDartVmSnapshotData = NULL;
+const uint8_t* kDartVmSnapshotInstructions = NULL;
+const uint8_t* kDartCoreIsolateSnapshotData = NULL;
+const uint8_t* kDartCoreIsolateSnapshotInstructions = NULL;
+}