Replaced glibc version of elf.h with musl version of elf.h.

src/third_party/glibc/README

-This directory contains the sources of the GNU C Library.
-See the file "version.h" for what release version you have.
-
-The GNU C Library is the standard system C library for all GNU systems,
-and is an important part of what makes up a GNU system.  It provides the
-system API for all programs written in C and C-compatible languages such
-as C++ and Objective C; the runtime facilities of other programming
-languages use the C library to access the underlying operating system.
-
-In GNU/Linux systems, the C library works with the Linux kernel to
-implement the operating system behavior seen by user applications.
-In GNU/Hurd systems, it works with a microkernel and Hurd servers.
-
-The GNU C Library implements much of the POSIX.1 functionality in the
-GNU/Hurd system, using configurations i[4567]86-*-gnu.  The current
-GNU/Hurd support requires out-of-tree patches that will eventually be
-incorporated into an official GNU C Library release.
-
-When working with Linux kernels, this version of the GNU C Library
-requires Linux kernel version 3.2 or later on all architectures except
-i[4567]86 and x86_64, where Linux kernel version 2.6.32 or later
-suffices.
-
-Also note that the shared version of the libgcc_s library must be
-installed for the pthread library to work correctly.
-
-The GNU C Library supports these configurations for using Linux kernels:
-
-        aarch64*-*-linux-gnu
-        alpha*-*-linux-gnu
-        arm-*-linux-gnueabi
-        hppa-*-linux-gnu        Not currently functional without patches.
-        i[4567]86-*-linux-gnu
-        x86_64-*-linux-gnu      Can build either x86_64 or x32
-        ia64-*-linux-gnu
-        m68k-*-linux-gnu
-        microblaze*-*-linux-gnu
-        mips-*-linux-gnu
-        mips64-*-linux-gnu
-        powerpc-*-linux-gnu     Hardware or software floating point, BE only.
-        powerpc64*-*-linux-gnu  Big-endian and little-endian.
-        s390-*-linux-gnu
-        s390x-*-linux-gnu
-        sh[34]-*-linux-gnu
-        sparc*-*-linux-gnu
-        sparc64*-*-linux-gnu
-        tilegx-*-linux-gnu
-        tilepro-*-linux-gnu
-
-If you are interested in doing a port, please contact the glibc
-maintainers; see http://www.gnu.org/software/libc/ for more
-information.
-
-See the file INSTALL to find out how to configure, build, and install
-the GNU C Library.  You might also consider reading the WWW pages for
-the C library at http://www.gnu.org/software/libc/.
-
-The GNU C Library is (almost) completely documented by the Texinfo manual
-found in the `manual/' subdirectory.  The manual is still being updated
-and contains some known errors and omissions; we regret that we do not
-have the resources to work on the manual as much as we would like.  For
-corrections to the manual, please file a bug in the `manual' component,
-following the bug-reporting instructions below.  Please be sure to check
-the manual in the current development sources to see if your problem has
-already been corrected.
-
-Please see http://www.gnu.org/software/libc/bugs.html for bug reporting
-information.  We are now using the Bugzilla system to track all bug reports.
-This web page gives detailed information on how to report bugs properly.
-
-The GNU C Library is free software.  See the file COPYING.LIB for copying
-conditions, and LICENSES for notices about a few contributions that require
-these additional notices to be distributed.  License copyright years may be
-listed using range notation, e.g., 1996-2015, indicating that every year in
-the range, inclusive, is a copyrightable year that would otherwise be listed
-individually.