Use xattr functions from sys/xattr.h instead of attr/xattr.h (closes #12720)
sys/xattr.h is glibc while attr/xattr.h is a separate library.
diff --git a/configure.in b/configure.in
index 800ba26..5a16bb0 100644
--- a/configure.in
+++ b/configure.in
@@ -1299,12 +1299,12 @@
# checks for header files
AC_HEADER_STDC
-AC_CHECK_HEADERS(asm/types.h attr/xattr.h conio.h curses.h direct.h dlfcn.h errno.h \
+AC_CHECK_HEADERS(asm/types.h conio.h curses.h direct.h dlfcn.h errno.h \
fcntl.h grp.h \
ieeefp.h io.h langinfo.h libintl.h ncurses.h poll.h process.h pthread.h \
sched.h shadow.h signal.h stdint.h stropts.h termios.h \
unistd.h utime.h \
-sys/audioio.h sys/bsdtty.h sys/epoll.h sys/event.h sys/file.h sys/loadavg.h \
+sys/audioio.h sys/xattr.h sys/bsdtty.h sys/epoll.h sys/event.h sys/file.h sys/loadavg.h \
sys/lock.h sys/mkdev.h sys/modem.h \
sys/param.h sys/poll.h sys/select.h sys/sendfile.h sys/socket.h sys/statvfs.h \
sys/stat.h sys/termio.h sys/time.h \