NetworkPkg: Add URI configuration form to HTTP boot driver.

This patch updates the HTTP boot driver to produce a setup page for the boot
file URI configuration. A new boot option will be created for the manual
configured URI address. This change is made to support the HTTP boot usage
in home environment.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Fu Siyuan <siyuan.fu@intel.com>
Reviewed-by: Wu Jiaxin <jiaxin.wu@intel.com>
Reviewed-by: Ye Ting <ting.ye@intel.com>

NetworkPkg/Include/Guid/HttpBootConfigHii.h

@@ -0,0 +1,25 @@
+/** @file
+  GUIDs used as HII FormSet and HII Package list GUID in HTTP boot driver.
+  
+Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+This program and the accompanying materials are licensed and made available under 
+the terms and conditions of the BSD License that accompanies this distribution.  
+The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php.                                            
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef __HTTP_BOOT_HII_GUID_H__
+#define __HTTP_BOOT_HII_GUID_H__
+
+#define HTTP_BOOT_CONFIG_GUID \
+  { \
+    0x4d20583a, 0x7765, 0x4e7a, { 0x8a, 0x67, 0xdc, 0xde, 0x74, 0xee, 0x3e, 0xc5 } \
+  }
+
+extern EFI_GUID gHttpBootConfigGuid;
+
+#endif