new command: BmcBlobWriteMeta

Implement new command BmcBlobWriteMeta.

Change-Id: I2e148f4bde4ef5d24db7e30bb02bdde024d9166a
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/blobs-ipmid/test/blob_mock.hpp b/blobs-ipmid/test/blob_mock.hpp
index 3396048..b70d3d1 100644
--- a/blobs-ipmid/test/blob_mock.hpp
+++ b/blobs-ipmid/test/blob_mock.hpp
@@ -19,6 +19,8 @@
     MOCK_METHOD3(open, bool(uint16_t, uint16_t, const std::string&));
     MOCK_METHOD3(read, std::vector<uint8_t>(uint16_t, uint32_t, uint32_t));
     MOCK_METHOD3(write, bool(uint16_t, uint32_t, const std::vector<uint8_t>&));
+    MOCK_METHOD3(writeMeta,
+                 bool(uint16_t, uint32_t, const std::vector<uint8_t>&));
     MOCK_METHOD2(commit, bool(uint16_t, const std::vector<uint8_t>&));
     MOCK_METHOD1(close, bool(uint16_t));
     MOCK_METHOD2(stat, bool(uint16_t, struct BlobMeta*));