libc/uClibc: fix building on system with recent glibc

While trying to build a toolchain with ct-ng 1.5.0,
arm-unknown-linux-uclibcgnueabi target,
I get the following error:

[INFO ] Installing C library headers
[EXTRA] Copying sources to build dir
[EXTRA] Applying configuration
[EXTRA] Building headers
[EXTRA] Installing headers
[ERROR] extra/scripts/unifdef.c:209: error: conflicting types for 'getline'
[ERROR] make[2]: *** [extra/scripts/unifdef] Error 1
[ERROR] Build failed in step 'Installing C library headers'

The following patch solves the problem.
(It's a backport of this uClibc commit:
http://git.uclibc.org/uClibc/commit/?id=49e81cada73616864b9b31df0aeb6961c30f5a6e
)

[--SNIP from another mail--]
AFAIK this is a problem since glibc 2.10.
(transplanted from 1ba79f2126df8bd89120899a58f2d0bcc2e9c771)

 diff -dur strace-4.5.16.orig/syscall.c strace-4.5.16/syscall.c

 --- strace-4.5.16.orig/syscall.c	2007-07-14 19:21:44.000000000 +0200

 +++ strace-4.5.16/syscall.c	2007-07-14 19:22:49.000000000 +0200

 @@ -125,6 +125,18 @@

  #define TP TRACE_PROCESS

  #define TS TRACE_SIGNAL

 +#ifndef HAVE_STATFS64

 +/*

 + * Ugly hacks for systems that do not have LFS

 + */

 +

 +#define sys_truncate64  sys_truncate

 +#define sys_ftruncate64 sys_ftruncate

 +#define sys_getdents64  sys_getdents

 +#define sys_statfs64    sys_statfs

 +#define sys_fstatfs64   sys_fstatfs

 +#endif

 +

  static const struct sysent sysent0[] = {

  #include "syscallent.h"

  };