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>

 # SPARC specific config options

 config ARCH_sparc

     select ARCH_SUPPORTS_32

     select ARCH_SUPPORTS_64

     select ARCH_DEFAULT_32

     select ARCH_USE_MMU

     select ARCH_SUPPORT_CPU

     select ARCH_SUPPORT_TUNE

     help

       The SUN SPARC architecture, as defined by:

         32 bit: http://www.sparc.org/standards/V8.pdf

         64 bit: http://www.sparc.org/standards/SPARCV9.pdf