Update V8 to r6387 as required by WebKit r76408

Change-Id: Icfc5385b0996bd592f8b1ac8cbb44767ee09f1f6
diff --git a/test/cctest/test-disasm-ia32.cc b/test/cctest/test-disasm-ia32.cc
index b563f8f..30d708e 100644
--- a/test/cctest/test-disasm-ia32.cc
+++ b/test/cctest/test-disasm-ia32.cc
@@ -416,7 +416,7 @@
     }
   }
 
-  // andpd, cmpltsd, movaps, psllq.
+  // andpd, cmpltsd, movaps, psllq, psrlq, por.
   {
     if (CpuFeatures::IsSupported(SSE2)) {
       CpuFeatures::Scope fscope(SSE2);
@@ -431,6 +431,18 @@
 
       __ psllq(xmm0, 17);
       __ psllq(xmm1, 42);
+
+      __ psllq(xmm0, xmm1);
+      __ psllq(xmm1, xmm2);
+
+      __ psrlq(xmm0, 17);
+      __ psrlq(xmm1, 42);
+
+      __ psrlq(xmm0, xmm1);
+      __ psrlq(xmm1, xmm2);
+
+      __ por(xmm0, xmm1);
+      __ por(xmm1, xmm2);
     }
   }