Massive refactoring of external header files.

This reduces the number of exported header files to the minimum needed by
the existing userspace utilities and firmware implementations.

BUG=chromium:221544
BRANCH=none
TEST=manual, trybots
CQ-DEPEND=CL:47019,CL:47022,CL:47023

  sudo FEATURES=test emerge vboot_reference
  FEATURES=test emerge-$BOARD \
                vboot_reference \
                chromeos-cryptohome \
                chromeos-installer \
                chromeos-u-boot \
                peach-u-boot \
                depthcharge

Change-Id: I2946cc2dbaf5459a6c5eca92ca57d546498e6d85
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/47021
Reviewed-by: Randall Spangler <rspangler@chromium.org>

firmware/lib/include/sysincludes.h

@@ -0,0 +1,28 @@
+/* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* System includes for vboot reference library.  This is the ONLY
+ * place in firmware/ where system headers may be included via
+ * #include <...>, so that there's only one place that needs to be
+ * fixed up for platforms which don't have all the system includes.
+ *
+ * Files in firmware/stub may still include system headers, because
+ * they're local implementations and will be ported to each system
+ * anyway. */
+
+#ifndef VBOOT_REFERENCE_SYSINCLUDES_H_
+#define VBOOT_REFERENCE_SYSINCLUDES_H_
+
+#include <inttypes.h>  /* For PRIu64 */
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#if defined(HAVE_ENDIAN_H) && defined(HAVE_LITTLE_ENDIAN)
+#include <byteswap.h>
+#include <memory.h>
+#endif
+
+#endif  /* VBOOT_REFERENCE_SYSINCLUDES_H_ */