tools: remove phosphor-ipmi-blobs dependency

The host tool depended on the BMC header: firmware_handler.hpp because
it defined the flags.  This header depends on phosphor-ipmi-blobs,
therefore the host-tool depends on this.  Move the flags into a separate
common header file and snip this dependency.

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: Id2ad33a1611c02605a1ed5c695429d0451eb98d4
diff --git a/bmc/main.cpp b/bmc/main.cpp
index 2dd9531..ea27b3d 100644
--- a/bmc/main.cpp
+++ b/bmc/main.cpp
@@ -18,6 +18,7 @@
 
 #include "file_handler.hpp"
 #include "firmware_handler.hpp"
+#include "flags.hpp"
 #include "image_handler.hpp"
 #include "lpc_aspeed.hpp"
 #include "lpc_handler.hpp"
@@ -80,12 +81,12 @@
 };
 
 std::vector<DataHandlerPack> supportedTransports = {
-    {FirmwareBlobHandler::UpdateFlags::ipmi, nullptr},
+    {FirmwareFlags::UpdateFlags::ipmi, nullptr},
 #ifdef ENABLE_PCI_BRIDGE
-    {FirmwareBlobHandler::UpdateFlags::p2a, &pciDataHandler},
+    {FirmwareFlags::UpdateFlags::p2a, &pciDataHandler},
 #endif
 #ifdef ENABLE_LPC_BRIDGE
-    {FirmwareBlobHandler::UpdateFlags::lpc, &lpcDataHandler},
+    {FirmwareFlags::UpdateFlags::lpc, &lpcDataHandler},
 #endif
 };