Add IPMI OEM command LinuxBootDone

Add a new OEM command for LinuxBoot to notify the BMC when it is about
to kexec into the OS. This is intended to give the BMC a chance to
prepare for an untrusted OS, e.g. disable any interfaces it doesn't want
the OS to have access to.

Tested:
Exercised the new OEM command using ipmitool
$ ipmitool raw 0x2e 0x32 0x79 0x2b 0x00 0x11
  79 2b 00 11

Change-Id: Ica76d77cdde48cebfbced32d8e7e860b559074e8
Signed-off-by: John Wedig <johnwedig@google.com>
diff --git a/test/meson.build b/test/meson.build
index 53064a1..7fa06c4 100644
--- a/test/meson.build
+++ b/test/meson.build
@@ -29,6 +29,7 @@
   'psu',
   'pcie_bifurcation',
   'bmc_mode',
+  'linux_boot_done',
 ]
 
 foreach t : tests