[Integrated] [foreign-jextract] RFR: Fix failing TestClassGeneration

[Jorn Vernee]

Changeset: 366462ae
Author:    Jorn Vernee <jvernee at openjdk.org>
Date:      2020-04-07 16:45:30 +0000
URL:       https://git.openjdk.java.net/panama-foreign/commit/366462ae

Fix failing TestClassGeneration

Reviewed-by: sundar

! test/jdk/tools/jextract/testClassGen/TestClassGeneration.java