Upgrade V8 to 5.1.281.57  DO NOT MERGE

FPIIM-449

Change-Id: Id981b686b4d587ac31697662eb98bb34be42ad90
(cherry picked from commit 3b9bc31999c9787eb726ecdbfd5796bfdec32a18)
diff --git a/src/compiler/x87/instruction-codes-x87.h b/src/compiler/x87/instruction-codes-x87.h
index e5d0912..d70a737 100644
--- a/src/compiler/x87/instruction-codes-x87.h
+++ b/src/compiler/x87/instruction-codes-x87.h
@@ -17,7 +17,11 @@
   V(X87Add)                        \
   V(X87And)                        \
   V(X87Cmp)                        \
+  V(X87Cmp16)                      \
+  V(X87Cmp8)                       \
   V(X87Test)                       \
+  V(X87Test16)                     \
+  V(X87Test8)                      \
   V(X87Or)                         \
   V(X87Xor)                        \
   V(X87Sub)                        \
@@ -31,6 +35,12 @@
   V(X87Shl)                        \
   V(X87Shr)                        \
   V(X87Sar)                        \
+  V(X87AddPair)                    \
+  V(X87SubPair)                    \
+  V(X87MulPair)                    \
+  V(X87ShlPair)                    \
+  V(X87ShrPair)                    \
+  V(X87SarPair)                    \
   V(X87Ror)                        \
   V(X87Lzcnt)                      \
   V(X87Popcnt)                     \