Changes to allow compilation of GetCommandAuditDigest.c

BUG=none
TEST=compilation succeeds:
   cc -Wall -Werror -c -o /dev/null GetCommandAuditDigest.c

Change-Id: Ifef6ff89e480429d9f493d7316e7821130e709d9
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/274186
Reviewed-by: Utkarsh Sanghi <usanghi@chromium.org>
diff --git a/CommandAudit_fp.h b/CommandAudit_fp.h
index 364186e..c05c3a7 100644
--- a/CommandAudit_fp.h
+++ b/CommandAudit_fp.h
@@ -12,6 +12,9 @@
         UINT32            count,                // IN: count of returned TPM_CC
         TPML_CC          *commandList           // OUT: list of TPM_CC
 );
+void CommandAuditGetDigest(
+        TPM2B_DIGEST     *digest                // OUT: command digest
+);
 BOOL CommandAuditSet(
         TPM_CC   commandCode  // IN: command code
 );