Fixes up dump_syms build on OS X so it works with ELF.

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.