gnu: packages: Use 'search-patches' everywhere.

gnu: packages: Use 'search-patches' everywhere.

* gnu/packages/abiword.scm: Use 'search-patches' for 'patches' field.
* gnu/packages/acl.scm: Likewise.
* gnu/packages/admin.scm: Likewise.
* gnu/packages/algebra.scm: Likewise.
* gnu/packages/animation.scm: Likewise.
* gnu/packages/apr.scm: Likewise.
* gnu/packages/audacity.scm: Likewise.
* gnu/packages/audio.scm: Likewise.
* gnu/packages/autotools.scm: Likewise.
* gnu/packages/avahi.scm: Likewise.
* gnu/packages/backup.scm: Likewise.
* gnu/packages/base.scm: Likewise.
* gnu/packages/bash.scm: Likewise.
* gnu/packages/bioinformatics.scm: Likewise.
* gnu/packages/cdrom.scm: Likewise.
* gnu/packages/ci.scm: Likewise.
* gnu/packages/cmake.scm: Likewise.
* gnu/packages/cpio.scm: Likewise.
* gnu/packages/cross-base.scm: Likewise.
* gnu/packages/dico.scm: Likewise.
* gnu/packages/doxygen.scm: Likewise.
* gnu/packages/ebook.scm: Likewise.
* gnu/packages/elf.scm: Likewise.
* gnu/packages/emacs.scm: Likewise.
* gnu/packages/engineering.scm: Likewise.
* gnu/packages/firmware.scm: Likewise.
* gnu/packages/flashing-tools.scm: Likewise.
* gnu/packages/fltk.scm: Likewise.
* gnu/packages/ftp.scm: Likewise.
* gnu/packages/games.scm: Likewise.
* gnu/packages/gawk.scm: Likewise.
* gnu/packages/gcc.scm: Likewise.
* gnu/packages/gd.scm: Likewise.
* gnu/packages/ghostscript.scm: Likewise.
* gnu/packages/glib.scm: Likewise.
* gnu/packages/gnome.scm: Likewise.
* gnu/packages/gnucash.scm: Likewise.
* gnu/packages/gnunet.scm: Likewise.
* gnu/packages/gnupg.scm: Likewise.
* gnu/packages/gnuzilla.scm: Likewise.
* gnu/packages/graphics.scm: Likewise.
* gnu/packages/grub.scm: Likewise.
* gnu/packages/gtk.scm: Likewise.
* gnu/packages/guile.scm: Likewise.
* gnu/packages/icu4c.scm: Likewise.
* gnu/packages/idutils.scm: Likewise.
* gnu/packages/image.scm: Likewise.
* gnu/packages/imagemagick.scm: Likewise.
* gnu/packages/irc.scm: Likewise.
* gnu/packages/ldc.scm: Likewise.
* gnu/packages/libcanberra.scm: Likewise.
* gnu/packages/libevent.scm: Likewise.
* gnu/packages/libreoffice.scm: Likewise.
* gnu/packages/libunwind.scm: Likewise.
* gnu/packages/libusb.scm: Likewise.
* gnu/packages/linux.scm: Likewise.
* gnu/packages/lirc.scm: Likewise.
* gnu/packages/llvm.scm: Likewise.
* gnu/packages/lsh.scm: Likewise.
* gnu/packages/lua.scm: Likewise.
* gnu/packages/lxqt.scm: Likewise.
* gnu/packages/mail.scm: Likewise.
* gnu/packages/maths.scm: Likewise.
* gnu/packages/mcrypt.scm: Likewise.
* gnu/packages/messaging.scm: Likewise.
* gnu/packages/mit-krb5.scm: Likewise.
* gnu/packages/mp3.scm: Likewise.
* gnu/packages/multiprecision.scm: Likewise.
* gnu/packages/music.scm: Likewise.
* gnu/packages/ninja.scm: Likewise.
* gnu/packages/nvi.scm: Likewise.
* gnu/packages/ocaml.scm: Likewise.
* gnu/packages/orpheus.scm: Likewise.
* gnu/packages/ots.scm: Likewise.
* gnu/packages/parallel.scm: Likewise.
* gnu/packages/patchutils.scm: Likewise.
* gnu/packages/pcre.scm: Likewise.
* gnu/packages/pdf.scm: Likewise.
* gnu/packages/perl.scm: Likewise.
* gnu/packages/plotutils.scm: Likewise.
* gnu/packages/polkit.scm: Likewise.
* gnu/packages/pulseaudio.scm: Likewise.
* gnu/packages/python.scm: Likewise.
* gnu/packages/qemu.scm: Likewise.
* gnu/packages/qt.scm: Likewise.
* gnu/packages/ratpoison.scm: Likewise.
* gnu/packages/rdf.scm: Likewise.
* gnu/packages/readline.scm: Likewise.
* gnu/packages/rush.scm: Likewise.
* gnu/packages/scheme.scm: Likewise.
* gnu/packages/screen.scm: Likewise.
* gnu/packages/sdl.scm: Likewise.
* gnu/packages/slim.scm: Likewise.
* gnu/packages/ssh.scm: Likewise.
* gnu/packages/tcl.scm: Likewise.
* gnu/packages/tcsh.scm: Likewise.
* gnu/packages/texinfo.scm: Likewise.
* gnu/packages/tls.scm: Likewise.
* gnu/packages/tor.scm: Likewise.
* gnu/packages/tv.scm: Likewise.
* gnu/packages/valgrind.scm: Likewise.
* gnu/packages/version-control.scm: Likewise.
* gnu/packages/video.scm: Likewise.
* gnu/packages/vpn.scm: Likewise.
* gnu/packages/vtk.scm: Likewise.
* gnu/packages/w3m.scm: Likewise.
* gnu/packages/web.scm: Likewise.
* gnu/packages/wicd.scm: Likewise.
* gnu/packages/wm.scm: Likewise.
* gnu/packages/xdisorg.scm: Likewise.
* gnu/packages/xfce.scm: Likewise.
* gnu/packages/xiph.scm: Likewise.
* gnu/packages/xml.scm: Likewise.
* gnu/packages/xorg.scm: Likewise.
* gnu/packages/zip.scm: Likewise.