build: add option --enable-host-bios

Add option to enable building in support for the host bios.

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I324fc071f07cd364fd39c7df1ccfd9f0fd509a46
diff --git a/util.cpp b/util.cpp
index 421fbaa..04ae17f 100644
--- a/util.cpp
+++ b/util.cpp
@@ -19,6 +19,7 @@
 namespace ipmi_flash
 {
 
+const std::string biosBlobId = "/flash/bios";
 const std::string updateBlobId = "/flash/update";
 const std::string verifyBlobId = "/flash/verify";
 const std::string hashBlobId = "/flash/hash";