Move DateMath weekdayName/monthName arrays to .rodata section

Source/wtf/DateMath.h

Index: Source/wtf/DateMath.h
diff --git a/Source/wtf/DateMath.h b/Source/wtf/DateMath.h
index cab4f0d72bfbeaa623e3426c53aa93b1eb16acf8..7c08cbc1b76210217a981d8ca245e5b58d7142b2 100644
--- a/Source/wtf/DateMath.h
+++ b/Source/wtf/DateMath.h
@@ -74,8 +74,8 @@ inline double jsCurrentTime()
     return floor(WTF::currentTimeMS());
 }
 
-const char* const weekdayName[7] = { "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun" };
-const char* const monthName[12] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
+const char weekdayName[7][4] = { "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun" };
+const char monthName[12][4] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
 const char* const monthFullName[12] = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" };
 
 const double hoursPerDay = 24.0;