Update V8 to r5804 as required by WebKit r72274

Change-Id: I287670630b22383dbce46e4a6fad4ec9eb37d8b8
diff --git a/src/arm/assembler-arm.h b/src/arm/assembler-arm.h
index 0579235..de3931c 100644
--- a/src/arm/assembler-arm.h
+++ b/src/arm/assembler-arm.h
@@ -1008,26 +1008,37 @@
   void vmov(const Register dst,
             const SwVfpRegister src,
             const Condition cond = al);
+  enum ConversionMode {
+    FPSCRRounding = 0,
+    RoundToZero = 1
+  };
   void vcvt_f64_s32(const DwVfpRegister dst,
                     const SwVfpRegister src,
+                    ConversionMode mode = RoundToZero,
                     const Condition cond = al);
   void vcvt_f32_s32(const SwVfpRegister dst,
                     const SwVfpRegister src,
+                    ConversionMode mode = RoundToZero,
                     const Condition cond = al);
   void vcvt_f64_u32(const DwVfpRegister dst,
                     const SwVfpRegister src,
+                    ConversionMode mode = RoundToZero,
                     const Condition cond = al);
   void vcvt_s32_f64(const SwVfpRegister dst,
                     const DwVfpRegister src,
+                    ConversionMode mode = RoundToZero,
                     const Condition cond = al);
   void vcvt_u32_f64(const SwVfpRegister dst,
                     const DwVfpRegister src,
+                    ConversionMode mode = RoundToZero,
                     const Condition cond = al);
   void vcvt_f64_f32(const DwVfpRegister dst,
                     const SwVfpRegister src,
+                    ConversionMode mode = RoundToZero,
                     const Condition cond = al);
   void vcvt_f32_f64(const SwVfpRegister dst,
                     const DwVfpRegister src,
+                    ConversionMode mode = RoundToZero,
                     const Condition cond = al);
 
   void vadd(const DwVfpRegister dst,
@@ -1056,6 +1067,8 @@
             const Condition cond = al);
   void vmrs(const Register dst,
             const Condition cond = al);
+  void vmsr(const Register dst,
+            const Condition cond = al);
   void vsqrt(const DwVfpRegister dst,
              const DwVfpRegister src,
              const Condition cond = al);