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>

--- glibc-2.12.1/sysdeps/unix/sysv/linux/kernel-features.h	2010-07-27 14:34:39.000000000 +0300

+++ glibc-2.12.1/sysdeps/unix/sysv/linux/kernel-features.h.new	2011-03-10 18:54:37.686795979 +0200

@@ -437,7 +437,8 @@

    the code.  On PPC they were introduced in 2.6.17-rc1,

    on SH in 2.6.19-rc1.  */

 #if __LINUX_KERNEL_VERSION >= 0x020611 \

-    && (!defined __sh__ || __LINUX_KERNEL_VERSION >= 0x020613)

+    && (!defined __sh__ || __LINUX_KERNEL_VERSION >= 0x020613) \

+    && (!defined __alpha__)

 # define __ASSUME_ATFCTS	1

 #endif