s-suite: install missing create_config.sh
When running s-suite v3.6, it complains that create_config.sh isn't
installed.
./config_params.sh: line 1: ../create_config.sh: No such file or directory
Rework so that create_config.sh is installed.
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Khem Raj <raj.khem@gmail.com>