Kaitai-based Intel ACM and BootGuard parsers

As the first step towards automated parsing, this change set replaces outdated BootGuard-related parsers with shiny new KaitaiStruct-based ones.
It also does the following:
- improves Intel FIT definitions by using the relevant specification
- adds sha1, sha384, sha512 and sm3 digest implementations
- updates LZMA SDK to v22.01
- moves GUIDs out of include files to prevent multiple instantiations
- enforces C++11
- adds Kaitai-based parsers for Intel FIT, BootGuard v1 and BootGuard v2 structures
- makes many small refactorings here, there and everywhere

common/digest/sha2.h

@@ -0,0 +1,27 @@
+/* sha2.h
+
+Copyright (c) 2017, Nikolaj Schlej. All rights reserved.
+This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution.  The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+*/
+
+#ifndef SHA2_H
+#define SHA2_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void sha256(const void *in, unsigned long inlen, void* out);
+void sha384(const void *in, unsigned long inlen, void* out);
+void sha512(const void *in, unsigned long inlen, void* out);
+
+#ifdef __cplusplus
+}
+#endif
+#endif // SHA2_H