Add crossystem arch (reports x86 or arm, depending on platform)

utility/crossystem_main.c

 /* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  *
  * Chrome OS firmware/system interface utility
  */
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ skipping 29 matching lines @@
   {"recovery_reason", 0, "Recovery mode reason for current boot"},
   {"savedmem_base", 0, "RAM debug data area physical address", "0x%08x"},
   {"savedmem_size", 0, "RAM debug data area size in bytes"},
   {"fmap_base", 0, "Main firmware flashmap physical address", "0x%08x"},
   {"tried_fwb", 0, "Tried firmware B before A this boot"},
   {"cros_debug", 0, "OS should allow debug features"},
   {"vdat_flags", 0, "Flags from VbSharedData", "0x%08x"},
   {"tpm_fwver", 0, "Firmware version stored in TPM", "0x%08x"},
   {"tpm_kernver", 0, "Kernel version stored in TPM", "0x%08x"},
   /* Read-only strings */
+  {"arch", IS_STRING, "Platform architecture"},
   {"hwid", IS_STRING, "Hardware ID"},
   {"fwid", IS_STRING, "Active firmware ID"},
   {"ro_fwid", IS_STRING, "Read-only firmware ID"},
   {"mainfw_act", IS_STRING, "Active main firmware"},
   {"mainfw_type", IS_STRING, "Active main firmware type"},
   {"ecfw_act", IS_STRING, "Active EC firmware"},
   {"kernkey_vfy", IS_STRING, "Type of verification done on kernel key block"},
   {"vdat_timers", IS_STRING, "Timer values from VbSharedData"},
   /* Writable integers */
   {"nvram_cleared", CAN_WRITE, "Have NV settings been lost?  Write 0 to clear"},
@@ skipping 195 matching lines @@
     if (has_set)
       retval = SetParam(p, value);
     else if (has_expect)
       retval = CheckParam(p, value);
     else
       retval = PrintParam(p);
   }
 
   return retval;
 }