Kotlin: default-parameter-mad-flow test: Make kotlinc call work on Windows

Author: igfoo

java/ql/integration-tests/all-platforms/kotlin/default-parameter-mad-flow/test.py

@@ -1,5 +1,5 @@
 from create_database_utils import *
 import subprocess
 
-subprocess.check_call(["kotlinc", "lib.kt", "-d", "lib"])
+subprocess.check_call([get_cmd("kotlinc"), "lib.kt", "-d", "lib"])
 run_codeql_database_create(["kotlinc user.kt -cp lib"], lang="java")