script: allow to pass any float value for CT_LOAD

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Message-Id: <b51acf21c72b4a8e882e.1359320015@laptop>
Patchwork-Id: 216062

 #!/bin/sh

 call_to=@@DEFAULT_LD@@

 case "${CTNG_LD_IS}" in

     bfd)    call_to=bfd;;

     gold)   call_to=gold;;

 esac

 exec "${0}.${call_to}" "$@"

 exit $?