Replaced calls to functions that msvc consider deprecated. Used...

src/log.cc

Index: src/log.cc
===================================================================
--- src/log.cc	(revision 280)
+++ src/log.cc	(working copy)
@@ -702,7 +702,7 @@
     if (strcmp(FLAG_logfile, "-") == 0) {
       logfile_ = stdout;
     } else {
-      logfile_ = fopen(FLAG_logfile, "w");
+      logfile_ = OS::FOpen(FLAG_logfile, "w");
     }
     mutex_ = OS::CreateMutex();
   }