iar-docker-images: Add 9.50.2 support

Signed-off-by: Arthur She <arthur.she@linaro.org>
Change-Id: I1c136fa4414b720459b9ac31f5d6e736bbb7fdce
diff --git a/iar-docker-images/builders.sh b/iar-docker-images/builders.sh
index 67a5861..01ac209 100755
--- a/iar-docker-images/builders.sh
+++ b/iar-docker-images/builders.sh
@@ -43,7 +43,7 @@
     set -ex
     touch /tmp/dckr-img-err
     cd $image
-    ./build.sh --build-arg IAR_LIC_NR=${IAR_LICENSE_NR} --build-arg IAR_LIC_EMAIL=${IAR_LICENSE_EMAIL}
+    ./build.sh --build-arg IAR_LIC_NR=${IAR_LICENSE_NR} --build-arg IAR_LIC_EMAIL=${IAR_LICENSE_EMAIL} --build-arg IAR_PACKAGE=${IAR_PACKAGE}
 #    echo "Uploading image: ${tag}"
 #    docker push $ECR/misra:$tag
     rm -f /tmp/dckr-img-err