build: avoid double-close bug with pipe2

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Based on Coverity's finding on the previous patch, I audited
gnulib's pipe2 code and found that we had the potential for
a subtle double-close bug, unless gnulib guarantees that the
contents of the fd array are unchanged on pipe2() failure.

* .gnulib: Update to latest, for pipe2 fix.

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Eric Blake committed 2011-06-30 11:36:52 -06:00

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.gnulib

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Submodule .gnulib updated: cbfd25f0ed...7269b35c8d.