Minidumper: Get the nexe's build ID from PT_NOTE when available

src/untrusted/minidump_generator/build_id.h

Index: src/untrusted/minidump_generator/build_id.h
diff --git a/src/untrusted/minidump_generator/build_id.h b/src/untrusted/minidump_generator/build_id.h
new file mode 100644
index 0000000000000000000000000000000000000000..8d0c017cf3bed8e666d7a4be780038915ca87b89
--- /dev/null
+++ b/src/untrusted/minidump_generator/build_id.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2013 The Native Client Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef NATIVE_CLIENT_SRC_UNTRUSTED_MINIDUMP_GENERATOR_BUILD_ID_H_
+#define NATIVE_CLIENT_SRC_UNTRUSTED_MINIDUMP_GENERATOR_BUILD_ID_H_ 1
+
+/*
+ * Get the build ID for the nexe.  This is a byte string that uniquely
+ * identifies the executable, typically a hash of its contents.
+ *
+ * On success, this returns 1 and fills out *data and *size.  If the
+ * build ID cannot be found, this returns 0.
+ */
+int nacl_get_build_id(const char **data, size_t *size);
+
+#endif