Revert of Remove SIMD.js from V8.

src/type-hints.h

Index: src/type-hints.h
diff --git a/src/type-hints.h b/src/type-hints.h
index c7c6cccae095bc250aeb8f950d78786c2cef55fc..c8dc490d69069590ed7c507e85bafebcbb083b99 100644
--- a/src/type-hints.h
+++ b/src/type-hints.h
@@ -56,9 +56,10 @@
   kString = 1u << 5,
   kSymbol = 1u << 6,
   kHeapNumber = 1u << 7,
+  kSimdValue = 1u << 8,
   kAny = kUndefined | kBoolean | kNull | kSmallInteger | kReceiver | kString |
-         kSymbol | kHeapNumber,
-  kNeedsMap = kReceiver | kString | kSymbol | kHeapNumber,
+         kSymbol | kHeapNumber | kSimdValue,
+  kNeedsMap = kReceiver | kString | kSymbol | kHeapNumber | kSimdValue,
   kCanBeUndetectable = kReceiver,
 };