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9bc864c8 - xgetcwd: Port to native Windows.

xgetcwd: Port to native Windows. Use a variant of the gnulib module 'xgetcwd' instead of our own (older) one. * gnulib-local/lib/xgetcwd.h: Remove file. * gnulib-local/lib/xgetcwd.c: Remove file. * gnulib-local/modules/xgetcwd: Remove file. * gnulib-local/modules/xgetcwd.diff: New file. * gnulib-local/Makefile.am (EXTRA_DIST): Update.