fchownat: Fix compilation error on Android 4.3. * lib/unistd.in.h: Include <sys/stat.h> when module 'fchownat' is in use. * m4/fchownat.m4 (gl_FUNC_FCHOWNAT_DEREF_BUG, gl_FUNC_FCHOWNAT_EMPTY_FILENAME_BUG): Include also <sys/stat.h>. * doc/posix-functions/fchownat.texi: Mention the issue.

# See lib/git-merge-changelog.c for making this useful.
ChangeLog	merge=merge-changelog

# Run this to make 'git diff' on texinfo files give nicer hunk context:
#   git config diff.texinfo.funcname '^@node[	 ][	 ]*\\([^,][^,]*\\)'
*.texi* diff=texinfo