include/elf.h: sync with GNU C library

Add NT_GNU_BUILD_ID and other defines to allow applications
using it to successfully compile. (f.e. firefox)

include/elf.h

@@ -1,6 +1,5 @@
 /* This file defines standard ELF types, structures, and macros.
-   Copyright (C) 1995-2003, 2004, 2005 Free Software Foundation, Inc.
+   Copyright (C) 1995-2018 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
@@ -1171,6 +1170,49 @@ typedef struct
 #define ELF_NOTE_OS_SOLARIS2	2
 #define ELF_NOTE_OS_FREEBSD	3
 
+/* Synthetic hwcap information.  The descriptor begins with two words:
+   word 0: number of entries
+   word 1: bitmask of enabled entries
+   Then follow variable-length entries, one byte followed by a
+   '\0'-terminated hwcap name string.  The byte gives the bit
+   number to test if enabled, (1U << bit) & bitmask.  */
+#define NT_GNU_HWCAP	2
+
+/* Build ID bits as generated by ld --build-id.
+   The descriptor consists of any nonzero number of bytes.  */
+#define NT_GNU_BUILD_ID	3
+
+/* Version note generated by GNU gold containing a version string.  */
+#define NT_GNU_GOLD_VERSION	4
+
+/* Program property.  */
+#define NT_GNU_PROPERTY_TYPE_0 5
+
+/* Note section name of program property.   */
+#define NOTE_GNU_PROPERTY_SECTION_NAME ".note.gnu.property"
+
+/* Synthetic hwcap information.  The descriptor begins with two words:
+   word 0: number of entries
+   word 1: bitmask of enabled entries
+   Then follow variable-length entries, one byte followed by a
+   '\0'-terminated hwcap name string.  The byte gives the bit
+   number to test if enabled, (1U << bit) & bitmask.  */
+#define NT_GNU_HWCAP	2
+
+/* Build ID bits as generated by ld --build-id.
+   The descriptor consists of any nonzero number of bytes.  */
+#define NT_GNU_BUILD_ID	3
+
+/* Version note generated by GNU gold containing a version string.  */
+#define NT_GNU_GOLD_VERSION	4
+
+/* Program property.  */
+#define NT_GNU_PROPERTY_TYPE_0 5
+
+/* Note section name of program property.   */
+#define NOTE_GNU_PROPERTY_SECTION_NAME ".note.gnu.property"
+
+
 
 /* Move records.  */
 typedef struct