RFR: 8243997: Linux build failed after JDK-8242244

[John Paul Adrian Glaubitz]

Hello!

Please review this small change which fixes the build on Linux which
broke on some systems after JDK-8242244.

Thanks,
Adrian

> [1] http://cr.openjdk.java.net/~glaubitz/8243997/webrev.00/

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz at debian.org
`. `'   Freie Universitaet Berlin - glaubitz at physik.fu-berlin.de
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