RFR: 8201360: Zero fails to build on linux-sparc after 8201236

[John Paul Adrian Glaubitz]

Hi!

Please review this minor change which fixes the Zero build on linux-sparc
which got broken after "JDK-8201236 Straighten out dtrace build logic".

The change affects the Zero build on linux-sparc only since SPARC has its
own implementation of memset_with_concurrent_readers() in memset_with_\
concurrent_readers_sparc.cpp which needs to be added to $(EXTRA_FILES)
by adding $(BUILD_LIBJVM_EXTRA_FILES) to $(EXTRA_FILES).

Thanks,
Adrian

> [1] http://cr.openjdk.java.net/~glaubitz/8201360/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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