libc/glibc: fix cross-compiling to i686

In OE-lite we use the attached patch for building i686 cross compilers.
Thanks to Khem Raj for original patch :-)

At the same time, remove the corresponding patch that was in
the ports patchset.

CC: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Esben Haabendal <eha@dev.doredevelopment.dk>
[yann.morin.1998@anciens.enib.fr: remove patch from ports]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

# x86 specific options

config ARCH_x86

    select ARCH_SUPPORTS_32

    select ARCH_SUPPORTS_64

    select ARCH_DEFAULT_32

    select ARCH_USE_MMU

    select ARCH_SUPPORT_ARCH

    select ARCH_SUPPORT_CPU

    select ARCH_SUPPORT_TUNE

    help

      The x86 architecture, as defined by:

        32-bit (ia32) : http://www.intel.com/

        64-bit (amd64): http://www.amd.com/us-en/Processors/DevelopWithAMD/0,,30_2252_875_7044,00.html