Update V8 to r5091 as required by WebKit r63859.

Change-Id: I8e35d765e6f6c7f89eccff900e1cabe2d5dd6110
diff --git a/test/cctest/test-disasm-arm.cc b/test/cctest/test-disasm-arm.cc
index f890fc1..2bb32e7 100644
--- a/test/cctest/test-disasm-arm.cc
+++ b/test/cctest/test-disasm-arm.cc
@@ -437,6 +437,11 @@
             "eeb10bc0       vsqrt.f64 d0, d0");
     COMPARE(vsqrt(d2, d3, ne),
             "1eb12bc3       vsqrt.f64ne d2, d3");
+
+    COMPARE(vmov(d0, 1.0),
+            "eeb70b00       vmov.f64 d0, #1");
+    COMPARE(vmov(d2, -13.0),
+            "eeba2b0a       vmov.f64 d2, #-13");
   }
 
   VERIFY_RUN();