pure: regenerate configure/Makefile.

* The backported patches modify configure.ac, which will force
  regenerate autotools file on make, and lead to running configure
  twice. Run "autoreconf" before configure to avoid this, and add
  comments to remove it on next upstream release.
rethinkdb 1.9

Closes #22473.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
appledoc: update sha1

The release was patched to address https://github.com/tomaz/appledoc/issues/395.

Closes #22471.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>