Fix trivial memory leak that occurs during tests. -------------
Commit messages: - Memory leak in exeNullCallerTest.cpp Changes: https://git.openjdk.org/jdk/pull/12715/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12715&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8303072 Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/12715.diff Fetch: git fetch https://git.openjdk.org/jdk pull/12715/head:pull/12715 PR: https://git.openjdk.org/jdk/pull/12715
