RFR: 8200203: Missing platform definitions for ia64

[John Paul Adrian Glaubitz]

Hi!

Please review this small change to the build system which adds the
platform definitions for ia64. This is one of two changes that is
necessary to get OpenJDK to build on ia64 (Zero variant).

Thanks,
Adrian

> [1] http://cr.openjdk.java.net/~glaubitz/8200203/webrev.01/

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