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.

 Sometime around 2.4.22-23, the mips pt_regs.h fields were reordered, breaking

 coredump handling by gdb for current kernels.  Update the hardcoded constants

 to reflect the change.

 --- gdb-6.2.1/gdb/mips-linux-tdep.c-orig	2004-10-29 14:23:55.000000000 -0500

 +++ gdb-6.2.1/gdb/mips-linux-tdep.c	2004-10-29 14:26:44.000000000 -0500

 @@ -53,12 +53,22 @@

  #define EF_REG0			6

  #define EF_REG31		37

 +

 +#if 0

  #define EF_LO			38

  #define EF_HI			39

  #define EF_CP0_EPC		40

  #define EF_CP0_BADVADDR		41

  #define EF_CP0_STATUS		42

  #define EF_CP0_CAUSE		43

 +#else

 +#define EF_CP0_STATUS		38

 +#define EF_LO			39

 +#define EF_HI			40

 +#define EF_CP0_BADVADDR		41

 +#define EF_CP0_CAUSE		42

 +#define EF_CP0_EPC		43

 +#endif

  #define EF_SIZE			180