build-setup.sh: prevent git clone when only building container

When someone wants to just build the container, there's no need to clone
openbmc.

Tested:
- Confirmed no clone when CONTAINER_ONLY set to true
- Confirmed a clone when CONTAINER_ONLY is not set

Change-Id: I7765c8511cffe2db9b94f3e8e5815300fd9c65f1
Signed-off-by: Andrew Geissler <[email protected]>

Author: geissonator

build-setup.sh

@@ -124,7 +124,7 @@ fi
 echo "Build started, $(date)"
 
 # If the obmc_dir directory doesn't exist clone it in
-if [ ! -d "${obmc_dir}" ]; then
+if [ ! -d "${obmc_dir}" ] && [ "${container_only}" = false ]; then
     echo "Clone in openbmc master to ${obmc_dir}"
     git clone https://github.com/openbmc/openbmc "${obmc_dir}"
 fi