attr: Add a patch to fix an unconditional infinite recursion

The bump to 2.4.48 introduced a bug that, according to the author,
only happen in certain cases on glibc. But under uclibc-ng, it happens
every time.

The bug essentially cause any program calling any libattr.so function
to enter an infinite recursion, because of a symbol conflict between
uclibc-ng and libattr wrappers, that causes the libattr wrappers to
call themselves.

This infinite recursion does not consume the stack, so programs
basically behave like they enter an infinite loop.

It is easy to reproduce with qemu_arm_versatile_defconfig +
BR2_PACKAGE_ATTR: "getfattr ." never returns and takes 100% CPU.

Upstream fixed it, but the patch is not part of a release yet,
so take the patch.

Signed-off-by: Nicolas Cavallari <nicolas.cavallari@green-communications.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>