make distclean and quail

[Juanma Barranquero]

Isn't that bit in leim/Makefile.in a bit too trigger happy?

  distclean: clean
  -[ `cd ${srcdir} && /bin/pwd` != `/bin/pwd` ] && rm -rf quail
  rm -f Makefile

There are files in leim/quail which are not autogenerated, and in fact
after "make distclean & make bootstrap" I get this bzr status:

removed:
  leim/quail/.gitignore
  leim/quail/arabic.el
  leim/quail/croatian.el
  leim/quail/cyril-jis.el
  leim/quail/cyrillic.el
  leim/quail/czech.el
  leim/quail/ethiopic.el
  leim/quail/georgian.el
  leim/quail/greek.el
  leim/quail/hangul.el
  leim/quail/hanja-jis.el
  leim/quail/hanja.el
  leim/quail/hanja3.el
  leim/quail/hebrew.el
  leim/quail/indian.el
  leim/quail/ipa-praat.el
  leim/quail/ipa.el
  leim/quail/japanese.el
  leim/quail/lao.el
  leim/quail/latin-alt.el
  leim/quail/latin-ltx.el
  leim/quail/latin-post.el
  leim/quail/latin-pre.el
  leim/quail/lrt.el
  leim/quail/persian.el
  leim/quail/py-punct.el
  leim/quail/pypunct-b5.el
  leim/quail/rfc1345.el
  leim/quail/sgml-input.el
  leim/quail/sisheng.el
  leim/quail/slovak.el
  leim/quail/symbol-ksc.el
  leim/quail/thai.el
  leim/quail/tibetan.el
  leim/quail/uni-input.el
  leim/quail/viqr.el
  leim/quail/vntelex.el
  leim/quail/vnvni.el
  leim/quail/welsh.el

  Juanma