Please update gnulib (PowerPC build fix)

[Andreas Metzler]

Hello,

please update gnulib to at least
c65d65a81e9d66960ae7ce5abe5069d5b7338ed2. The version currently used
(for 2.12.x) has a testsuite error on powerpc.
http://mid.gmane.org/201109300359.31777.bruno%40clisp.org

thanks, cu andreas
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