Allow fully qulified file name in tools to check for.
Simplify checking for bash.

/trunk/configure | 30 13 17 0 +++++++++++++-----------------
1 file changed, 13 insertions(+), 17 deletions(-)

# Compute x86_64-specific values

CT_DoArchValues() {

    # The architecture part of the tuple:

    CT_TARGET_ARCH="${CT_ARCH}"

}