Update to V8 with partial snapshots. This is taken from the partial_snapshot branch of V8.
diff --git a/src/simulator.h b/src/simulator.h
index 6f8cd5a..485e930 100644
--- a/src/simulator.h
+++ b/src/simulator.h
@@ -34,6 +34,8 @@
 #include "x64/simulator-x64.h"
 #elif V8_TARGET_ARCH_ARM
 #include "arm/simulator-arm.h"
+#elif V8_TARGET_ARCH_MIPS
+#include "mips/simulator-mips.h"
 #else
 #error Unsupported target architecture.
 #endif