dhcp client: add class DHCPOptionWriter
Add class DHCPOptionsWriter for writing dhcp options.
Also add the corresponding unittests.
while there, change the variable name from 'option_number'
to 'option_code' for better readability.
Bug: 25642025
TEST=compile and unittests
Change-Id: I6410651d32525760405df427b38c961ce106293f
diff --git a/dhcp_message.h b/dhcp_message.h
index f8d2634..acd5db8 100644
--- a/dhcp_message.h
+++ b/dhcp_message.h
@@ -23,10 +23,10 @@
#include <vector>
#include <base/macros.h>
-
-#include <dhcp_client/dhcp_options_parser.h>
#include <shill/net/byte_string.h>
+#include "dhcp_client/dhcp_options_parser.h"
+
namespace dhcp_client {
static const uint8_t kDHCPMessageTypeDiscover = 1;