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-4.5.15.orig/process.c strace-4.5.15/process.c

--- strace-4.5.15.orig/process.c	2007-01-11 23:08:38.000000000 +0100

+++ strace-4.5.15/process.c	2007-07-14 19:19:58.000000000 +0200

@@ -2679,7 +2679,6 @@

        { 4*REG_GBR,            "4*REG_GBR"                             },

        { 4*REG_MACH,           "4*REG_MACH"                            },

        { 4*REG_MACL,           "4*REG_MACL"                            },

-       { 4*REG_SYSCALL,        "4*REG_SYSCALL"                         },

        { 4*REG_FPUL,           "4*REG_FPUL"                            },

        { 4*REG_FPREG0,         "4*REG_FPREG0"                          },

        { 4*(REG_FPREG0+1),     "4*REG_FPREG1"                          },