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(-)

# powerpc specific configuration file

config ARCH_powerpc

    select ARCH_SUPPORT_ABI

    select ARCH_SUPPORT_CPU

    select ARCH_SUPPORT_TUNE

    help

      The PowerPC architecture, as defined by:

        http://www.ibm.com/developerworks/eserver/articles/archguide.html