uefi: Add a sha1 file for the uefi bitmap block.

This file is stolen from the samus board.

Change-Id: I8f88eda3b8f1243ca491e49d541735144b409e04
diff --git a/big/board/uefi/blobs/bmpblk.bin.sha1 b/big/board/uefi/blobs/bmpblk.bin.sha1
new file mode 100644
index 0000000..78097eb
--- /dev/null
+++ b/big/board/uefi/blobs/bmpblk.bin.sha1
@@ -0,0 +1 @@
+fa9647c8344e3398873fe84c8961660e57b6d1a9