adds missing [[ to elif statement in scripts/incremental_build.sh (#2358)

script/incremental_build.sh

diff --git a/script/incremental_build.sh b/script/incremental_build.sh
index 34febdf..ec2d7e5 100755
--- a/script/incremental_build.sh
+++ b/script/incremental_build.sh
@@ -26,7 +26,7 @@
 ACTIONS=("$@")
 if [[ "${#ACTIONS[@]}" == 0 ]]; then
   ACTIONS=("analyze" "--custom-analysis" "$CUSTOM_FLAG" "test" "java-test")
-elif [ "${ACTIONS[@]}" == "analyze" ]; then
+elif [[ "${ACTIONS[@]}" == "analyze" ]]; then
   ACTIONS=("analyze" "--custom-analysis" "$CUSTOM_FLAG")
 fi