libg/eglibc: add updated eglibc 2.15

Includes a patch to remove __builtin_expect test:

In eglibc-2.15, the build breaks in configure while testing
for the existance of __builtin_expect. It fails with newer
versions of gcc.

This patch is a modification of an upstream change in glibc
mainline (to be 2.16) to fix the following error:

[CFG ] checking for __builtin_expect... no
[ERROR] configure: error: support for __builtin_expect needed

http://sourceware.org/git/?p=glibc.git;a=commit;h=3857022a761ea7251f8e5c0e45d382ebc3e34cf9

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>
[yann.morin.1998@free.fr: coalesce both patches into a single changeset]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

(C) 2007 Yann E. MORIN <yann.morin.1998@anciens.enib.fr>

License: LGPL v2.1

Shut off a stupid warning: preffered-stack-boundary must be between 4 ad 12,

and 2 is not.

diff -dur glibc-2.5.orig/sysdeps/i386/Makefile glibc-2.5/sysdeps/i386/Makefile

--- glibc-2.5.orig/sysdeps/i386/Makefile	2005-03-06 01:18:16.000000000 +0100

+++ glibc-2.5/sysdeps/i386/Makefile	2007-05-27 17:49:37.000000000 +0200

@@ -36,7 +36,7 @@

 ifeq ($(subdir),csu)

 sysdep-CFLAGS += -mpreferred-stack-boundary=4

 else

-sysdep-CFLAGS += -mpreferred-stack-boundary=2

+sysdep-CFLAGS += -mpreferred-stack-boundary=4

 # Likewise, any function which calls user callbacks

 uses-callbacks += -mpreferred-stack-boundary=4

 # Likewise, any stack alignment tests