Recent update of python36 breaks build

[Paul Goyette <paul%whooppee.com@localhost>]

With up-to-date pkgsrc, I'm seeing the following errors while trying to 
build a new python36.  Did some man pages get removed?

...
Creating directory /usr/pkg/man
Creating directory /usr/pkg/man/man1
/usr/bin/install -c -o root -g wheel -m 644 ./Misc/python.man  /tmp/pkgs/lang/python36/work.x86_64/.destdir/usr/pkg/man/man1/python3.6.1
if test "xno" != "xno"  ; then  case no in  upgrade) ensurepip="--altinstall --upgrade" ;;  install|*) ensurepip="--altinstall" ;;  esac;  LD_LIBRARY_PATH=/tmp/pkgs/lang/python36/work.x86_64/Python-3.6.1 ./python -E -m ensurepip  $ensurepip --root=/tmp/pkgs/lang/python36/work.x86_64/.destdir/ ;  fi
=> Automatic manual page handling
pkg_create: can't stat `/tmp/pkgs/lang/python36/work.x86_64/.destdir/usr/pkg/lib/python3.6/lib-dynload/_asyncio.so'
pkg_create: can't stat `/tmp/pkgs/lang/python36/work.x86_64/.destdir/usr/pkg/lib/python3.6/lib-dynload/_socket.so'
pkg_create: can't stat `/tmp/pkgs/lang/python36/work.x86_64/.destdir/usr/pkg/lib/python3.6/lib-dynload/_ssl.so'
=> Creating binary package /tmp/pkgs/lang/python36/work.x86_64/.packages/python36-3.6.1nb2.tgz
pkg_create: can't stat `/tmp/pkgs/lang/python36/work.x86_64/.destdir/usr/pkg/lib/python3.6/lib-dynload/_asyncio.so'
pkg_create: can't stat `/tmp/pkgs/lang/python36/work.x86_64/.destdir/usr/pkg/lib/python3.6/lib-dynload/_socket.so'
pkg_create: can't stat `/tmp/pkgs/lang/python36/work.x86_64/.destdir/usr/pkg/lib/python3.6/lib-dynload/_ssl.so'
pkg_create: lstat failed for file lib/python3.6/lib-dynload/_asyncio.so: No such file or directory
mv: rename /tmp/pkgs/lang/python36/work.x86_64/.packages/python36-3.6.1nb2.tmp.tgz to /tmp/pkgs/lang/python36/work.x86_64/.packages/python36-3.6.1nb2.tgz: No such file or directory
*** Error code 1

Stop.

+------------------+--------------------------+----------------------------+
| Paul Goyette     | PGP Key fingerprint:     | E-mail addresses:          |
| (Retired)        | FA29 0E3B 35AF E8AE 6651 | paul at whooppee dot com   |
| Kernel Developer | 0786 F758 55DE 53BA 7731 | pgoyette at netbsd dot org |
+------------------+--------------------------+----------------------------+