RFR(XS) 8154268: [TESTBUG] Compilation of ExportAllUnnamed.java failed, missing @modules

[harold seigel]

Hi,

Please review this small change to fix test bug 8154268.

The change fixes the test's compilation error by adding @modules to the 
test.

Webrev: http://cr.openjdk.java.net/~hseigel/bug_8154268/

JBS Bug: https://bugs.openjdk.java.net/browse/JDK-8154268

Thanks, Harold