tests: Add an option to force copy config files

"./build.sh --force-config" can be used to force copying configuration
files before building. This will overwrite any changes in .config files.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>

tests/hwsim/build.sh

@@ -5,18 +5,23 @@ set -e
 cd $(dirname $0)
 
 use_lcov=0
+force_config=0
 while [ "$1" != "" ]; do
 	case $1 in
 		-c | --codecov ) shift
 			echo "$0: use code coverage specified"
 			use_lcov=1
 			;;
+		-f | --force-config ) shift
+			force_config=1
+			echo "$0: force copy config specified"
+			;;
 		* ) exit 1
 	esac
 done
 
 cd ../../wpa_supplicant
-if [ ! -e .config ]; then
+if [ ! -e .config -o $force_config -eq 1 ]; then
     cp ../tests/hwsim/example-wpa_supplicant.config .config
 else
     echo "wpa_supplicant config file exists"
@@ -34,7 +39,7 @@ make clean
 make -j8
 
 cd ../hostapd
-if [ ! -e .config ]; then
+if [ ! -e .config -o $force_config -eq 1 ]; then
     cp ../tests/hwsim/example-hostapd.config .config
 else
     echo "hostapd config file exists"