gcc/java/parse.y: duplicate %type

[Akim Demaille]

Wihtout this patch, expect next Bison to reject GCJ's grammar.
Please, install.

| [The FSF has my papers, but I doubt it matters for such a simple
| patch.]
| 
| This patch is straightforward: it remove three duplicate %typings.
| The problem is that there appear to be *many* trailing spaces in the
| file, so I send my patch in two flavors: first the diff -w flavor:

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| then the native one, where Emacs has trimmed all the trailing spaces.
| It is *the same*, but for trailing spaces.

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