RFR(XS): 8215342: [Zero] Build fails after JDK-8200613

[Severin Gehwolf]

Hi,

Can I get reviews for this (trivial?) Zero build fix, please?

Bug: https://bugs.openjdk.java.net/browse/JDK-8215342
webrev: http://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8215342/01/webrev/

Testing: Zero builds again on x86_64 Linux. Failed earlier.

Thanks,
Severin