Ensure 16-byte stack alignment on Solaris.

src/platform-solaris.cc

Index: src/platform-solaris.cc
diff --git a/src/platform-solaris.cc b/src/platform-solaris.cc
index b8124910be1a38a1dcc24f7863c892c5984439fb..dd4bd5d7c560f3b191ebaad036a3483fed7d27eb 100644
--- a/src/platform-solaris.cc
+++ b/src/platform-solaris.cc
@@ -1,4 +1,4 @@
-// Copyright 2006-2009 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -105,7 +105,8 @@ uint64_t OS::CpuFeaturesImpliedByPlatform() {
 
 
 int OS::ActivationFrameAlignment() {
-  return STACK_ALIGN;
+  // GCC generates code that requires 16 byte alignment such as movdqa.
+  return Max(STACK_ALIGN, 16);
 }