gnu: Move autoconf-style phases after the unpack phase.

* gnu/packages/audio.scm (soundtouch)[arguments]: Move 'bootstrap'
  after 'unpack'.  Remove custom /usr/bin/file patching, which will
  now be handled by the 'patch-usr-bin-file' phase.
* gnu/packages/emacs.scm (emacs-w3m)[arguments]: Rename 'pre-configure'
  phase to 'autoconf' and move it after 'unpack'.
* gnu/packages/fontutils.scm (libuninameslist)[arguments]: Move 'bootstrap'
  phase after 'unpack'.
* gnu/packages/libevent.scm (libuv)[arguments]: Move 'autogen' phase after
  'unpack'.  Run "sh autogen.sh" instead of "./autogen.sh".
* gnu/packages/linux.scm (bridge-utils)[arguments]: Move 'bootstrap' phase
  after 'unpack'.
* gnu/packages/mail.scm (libetpan)[arguments]: Move 'autogen' phase after
  'unpack'.  Run "sh autogen.sh" instead of "./autogen.sh".  Setenv
  "NOCONFIGURE" before running autogen.sh.
* gnu/packages/package-management.scm (guix-devel)[arguments]: Move
  'bootstrap' phase after 'unpack'.  Run "sh autogen.sh" instead of
  "./autogen.sh".
* gnu/packages/rdf.scm (lrdf)[arguments]: Move 'autoreconf' phase after
  'remove-out-of-tree-references' phase.
* gnu/packages/tor.scm (privoxy)[arguments]: Move 'autoconf' phase after
  'unpack'.
* gnu/packages/web.scm (libpsl)[arguments]: Move 'bootstrap' phase after
  'unpack'.  Run "sh autogen.sh" instead of "./autogen.sh".  Remove
  'fix-autogen-shebang' phase.