Backport #969 from trunk:
Rebuild the kconfig stuff on kconfig source change.

/branches/1.2/kconfig/kconfig.mk | 14 12 2 0 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)

# Compute powerpc-specific values

CT_DoArchValues () {

    # The architecture part of the tuple:

    CT_TARGET_ARCH="${CT_ARCH}"

    # The kernel ARCH:

    CT_KERNEL_ARCH=powerpc

}