Add infrastructure to use common config files for generated config files.

/trunk/config/libc/glibc-eglibc.in-common | 4 4 0 0 ++++
/trunk/config/config.mk | 4 4 0 0 ++++
/trunk/config/libc.in | 7 0 7 0 -------
3 files changed, 8 insertions(+), 7 deletions(-)

# x86 specific options

config ARCH_x86

    select ARCH_SUPPORT_ARCH

    select ARCH_SUPPORT_CPU

    select ARCH_SUPPORT_TUNE

    help

      The x86 architecture, as defined by:

        http://www.intel.com/