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This incorporates:
2017-05-14 same-inode: Adapt for windows-stat-inodes
2017-05-14 windows-stat-inodes: New module
2017-05-14 stat-time: Adapt for windows-stat-timespec
* lib/gnulib.mk.in: Regenerate.
* lib/stat-time.h, lib/sys_types.in.h, m4/sys_types_h.m4:
Copy from gnulib.