Update V8 to r4588

We're using WebKit r58033, as used by
http://src.chromium.org/svn/releases/5.0.387.0/DEPS
This requires http://v8.googlecode.com/svn/trunk@4465 but this version has a
crashing bug for ARM. Instead we use http://v8.googlecode.com/svn/trunk@4588,
which is used by http://src.chromium.org/svn/releases/6.0.399.0/DEPS

Note that a trivial bug fix was required in arm/codegen-arm.cc. This is guarded
with ANDROID. See http://code.google.com/p/v8/issues/detail?id=703

Change-Id: I459647a8286c4f8c7405f0c5581ecbf051a6f1e8
diff --git a/test/cctest/test-disasm-arm.cc b/test/cctest/test-disasm-arm.cc
index 69efdc5..9b15525 100644
--- a/test/cctest/test-disasm-arm.cc
+++ b/test/cctest/test-disasm-arm.cc
@@ -248,6 +248,16 @@
   COMPARE(mvn(r5, Operand(r4), SetCC, cc),
           "31f05004       mvnccs r5, r4");
 
+  // Miscellaneous instructions encoded as type 0.
+  COMPARE(blx(ip),
+          "e12fff3c       blx ip");
+  COMPARE(bkpt(0),
+          "e1200070       bkpt 0");
+  COMPARE(bkpt(0xffff),
+          "e12fff7f       bkpt 65535");
+  COMPARE(clz(r6, r7),
+          "e16f6f17       clz r6, r7");
+
   VERIFY_RUN();
 }