Update V8 to r5675 as required by WebKit r70209

Change-Id: Ib10adb470d41ca8c109ead5fc893b880e18d489f
diff --git a/SConstruct b/SConstruct
index 2a39583..a36a96f 100644
--- a/SConstruct
+++ b/SConstruct
@@ -206,7 +206,8 @@
     },
     'simulator:arm': {
       'CCFLAGS':      ['-m32'],
-      'LINKFLAGS':    ['-m32']
+      'LINKFLAGS':    ['-m32'],
+      'CPPDEFINES':   ['USE_SIMULATOR']
     },
     'arch:mips': {
       'CPPDEFINES':   ['V8_TARGET_ARCH_MIPS'],
@@ -217,7 +218,8 @@
     },
     'simulator:mips': {
       'CCFLAGS':      ['-m32'],
-      'LINKFLAGS':    ['-m32']
+      'LINKFLAGS':    ['-m32'],
+      'CPPDEFINES':   ['USE_SIMULATOR']
     },
     'arch:x64': {
       'CPPDEFINES':   ['V8_TARGET_ARCH_X64'],
@@ -663,17 +665,17 @@
   'toolchain': {
     'values': ['gcc', 'msvc'],
     'default': TOOLCHAIN_GUESS,
-    'help': 'the toolchain to use (' + TOOLCHAIN_GUESS + ')'
+    'help': 'the toolchain to use (%s)' % TOOLCHAIN_GUESS
   },
   'os': {
     'values': ['freebsd', 'linux', 'macos', 'win32', 'android', 'openbsd', 'solaris'],
     'default': OS_GUESS,
-    'help': 'the os to build for (' + OS_GUESS + ')'
+    'help': 'the os to build for (%s)' % OS_GUESS
   },
   'arch': {
     'values':['arm', 'ia32', 'x64', 'mips'],
     'default': ARCH_GUESS,
-    'help': 'the architecture to build for (' + ARCH_GUESS + ')'
+    'help': 'the architecture to build for (%s)' % ARCH_GUESS
   },
   'regexp': {
     'values': ['native', 'interpreted'],