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/test/firmware_sessionstat_unittest.cpp b/bmc/test/firmware_sessionstat_unittest.cpp
index d2d1896..dcb16d9 100644
--- a/bmc/test/firmware_sessionstat_unittest.cpp
+++ b/bmc/test/firmware_sessionstat_unittest.cpp
@@ -30,8 +30,7 @@
     EXPECT_CALL(imageMock, open("asdf")).WillOnce(Return(true));
 
     EXPECT_TRUE(handler->open(
-        0, blobs::OpenFlags::write | FirmwareBlobHandler::UpdateFlags::ipmi,
-        "asdf"));
+        0, blobs::OpenFlags::write | FirmwareFlags::UpdateFlags::ipmi, "asdf"));
 
     int size = 512;
     EXPECT_CALL(imageMock, getSize()).WillOnce(Return(size));
@@ -39,7 +38,7 @@
     blobs::BlobMeta meta;
     EXPECT_TRUE(handler->stat(0, &meta));
     EXPECT_EQ(meta.blobState,
-              blobs::OpenFlags::write | FirmwareBlobHandler::UpdateFlags::ipmi);
+              blobs::OpenFlags::write | FirmwareFlags::UpdateFlags::ipmi);
     EXPECT_EQ(meta.size, size);
     EXPECT_EQ(meta.metadata.size(), 0);
 }
@@ -54,8 +53,7 @@
     EXPECT_CALL(imageMock, open("asdf")).WillOnce(Return(true));
 
     EXPECT_TRUE(handler->open(
-        0, blobs::OpenFlags::write | FirmwareBlobHandler::UpdateFlags::lpc,
-        "asdf"));
+        0, blobs::OpenFlags::write | FirmwareFlags::UpdateFlags::lpc, "asdf"));
 
     int size = 512;
     EXPECT_CALL(imageMock, getSize()).WillOnce(Return(size));
@@ -65,7 +63,7 @@
     blobs::BlobMeta meta;
     EXPECT_TRUE(handler->stat(0, &meta));
     EXPECT_EQ(meta.blobState,
-              blobs::OpenFlags::write | FirmwareBlobHandler::UpdateFlags::lpc);
+              blobs::OpenFlags::write | FirmwareFlags::UpdateFlags::lpc);
     EXPECT_EQ(meta.size, size);
     EXPECT_EQ(meta.metadata.size(), mBytes.size());
     EXPECT_EQ(meta.metadata[0], mBytes[0]);