Make get_gcc_multiarch_setting more elegant. Use a dictionnary
to store the config options and replace bb.data.getVar with d.getVar.
Remove i686 from the architecture list because it doesn't seem
to be a valid TARGET_ARCH any more in OE.
Configure gdb (gdb and gdb-cross) with --enable-64-bit-bfd if
multiarch DISTRO_FEATURE is present
(From OE-Core rev: 0b42b2fc118bef8ce0d1473b146673182f5d1f78)
Signed-off-by: Julian Pidancet <julian.pidancet@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>