Michael ABBOTT reported that populate is not relocatable.
Fix this by determining both the cross-readelf and the sys-root at runtime, not at build time.

/trunk/configure | 1 1 0 0 +
/trunk/scripts/crosstool.sh | 14 6 8 0 ++++++--------
/trunk/tools/populate.in | 6 4 2 0 ++++--
3 files changed, 11 insertions(+), 10 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

}