Took care of mysql test suite failures on Windows.

mysql-test/suite/rpl/t/rpl_binlog_corruption.test:
  Disabled the test for Windows (see bug #47639)
mysql-test/suite/rpl/t/rpl_killed_ddl.test:
  Disabled the test for Windows (see bug #47638)
vio/viosocket.c:
  Added an implementation of vio_poll_read for Windows.
  Winsock does not support the poll function.
  So the existing generic implementation of vio_poll_read
  could not be used for Windows.

mysql-test/suite/rpl/t/rpl_binlog_corruption.test

@@ -15,6 +15,9 @@
 # BUG#31793: log event corruption causes crash
 # BUG#40482: server/mysqlbinlog crashes when reading invalid Incident_log_event
 
+# Temporarily disabled on Windows due to bug #47639 
+--source include/not_windows.inc
+
 source include/have_log_bin.inc;
 # BUG#40482 only manifested itself in debug-compiled binaries.
 source include/have_debug.inc;

mysql-test/suite/rpl/t/rpl_killed_ddl.test

@@ -31,6 +31,9 @@
 #  - BUG#25705
 #  - BUG#44171
 
+# Temporarily disabled on Windows due to bug #47638 
+--source include/not_windows.inc
+
 source include/have_debug.inc;
 source include/master-slave.inc;
 

vio/viosocket.c

@@ -361,7 +361,20 @@ void vio_in_addr(Vio *vio, struct in_addr *in)
 my_bool vio_poll_read(Vio *vio,uint timeout)
 {
 #ifndef HAVE_POLL
+#if __WIN__
+  int res;
+  struct fd_set fds;
+  struct timeval tv;
+  DBUG_ENTER("vio_poll");
+  fds.fd_count= 1;
+  fds.fd_array[0]= vio->sd;
+  tv.tv_sec= timeout;
+  tv.tv_usec= 0;
+  res= select(1, &fds, NULL, NULL, &tv) ? 0 : 1;
+  DBUG_RETURN(res);
+#else
   return 0;
+#endif
 #else
   struct pollfd fds;
   int res;