[gold patch]Fix gold build on MacOSX Xcode 3.2.6

[Andreas Schwab]

Jing Yu <jingyu@google.com> writes:

> The gcc 4.2.1 (Apple Inc. build 5666, dot 3) comes with Xcode 3.2.6
> emits warning for "while (0);" and breaks the build (thanks to -Werror
> which treat warning as error).  Add "{}" to fix it.
>
> Gold make check passes on x86-64.
>
> 2012-06-05  Jing Yu  <jingyu@google.com>
>
>         * gold.h (textdomain): Add {} to empty while(0)
>                       (bindtextdomain): Likewise

That makes it unsafe as a statement.

Andreas.

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Andreas Schwab, schwab@linux-m68k.org
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