Don't add versions that already exist.

/trunk/scripts/addToolVersion.sh | 15 14 1 0 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)

 # Compute x86_64-specific values

 CT_DoArchTupleValues() {

     # The architecture part of the tuple:

     CT_TARGET_ARCH="${CT_ARCH}"

 }