Run php tests when 3rdparty changed

Signed-off-by: Daniel Kesselberg <mail@danielkesselberg.de>

tests/drone-run-php-tests.sh

@@ -22,4 +22,6 @@ echo "========================="
 
 [[ $(git diff --name-only origin/$DRONE_TARGET_BRANCH...$DRONE_COMMIT_SHA | grep -c "/tests/") -gt 0 ]] && echo "PHP test files of an app are modified" && exit 0
 
+[[ $(git diff --name-only origin/$DRONE_TARGET_BRANCH...$DRONE_COMMIT_SHA | grep -c "3rdparty") -gt 0 ]] && echo "3rdparty is modified" && exit 0
+
 exit 1