Bundle up the utilities methods used in dump_kernel_config and

export them as a library to be used by post installer programs.

A matching change to vboot_reference-9999.ebuild is also required.

TEST=Built, verified library symbols with nm on x86-mario, amd64-generic.
BUG=chromium-os:25381

Change-Id: Icb23838a8cd804e0c66718c6d4d60f639ee6b72f
Reviewed-on: https://gerrit.chromium.org/gerrit/14770
Commit-Ready: Don Garrett <dgarrett@chromium.org>
Reviewed-by: Don Garrett <dgarrett@chromium.org>
Tested-by: Don Garrett <dgarrett@chromium.org>

utility/include/dump_kernel_config.h

@@ -0,0 +1,19 @@
+/* Copyright (c) 2012 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.
+ *
+ * Exports the kernel commandline from a given partition/image.
+ */
+
+#ifndef DUMP_KERNEL_CONFIG_UTILITY_H_
+#define DUMP_KERNEL_CONFIG_UTILITY_H_
+
+#include <inttypes.h>
+#include <stdlib.h>
+
+uint8_t* find_kernel_config(uint8_t* blob, uint64_t blob_size,
+                            uint64_t kernel_body_load_address);
+
+void* MapFile(const char* filename, size_t *size);
+
+#endif  // DUMP_KERNEL_CONFIG_UTILITY_H_