a5ona4: fix and simplify script to work with newer pdflatex versions

.local/bin/tools/a5ona4

@@ -4,21 +4,10 @@ for file in $@; do
 	INPUTPDF=/tmp/file.pdf
 	cp -f "$file" $INPUTPDF
 	printf '\\documentclass[a4paper,final]{article}
-	\\usepackage{pdfpages}
+\\usepackage{pdfpages}
-	\\usepackage{ifpdf,ifxetex,everyshi}
+\\begin{document}
-	\\makeatletter
+\\includepdf[pages=-, nup=2x1, booklet=true, landscape]{%s}
-	\\ifpdf
+\\end{document}' "$INPUTPDF" > /tmp/tmp$$.tex
-	\\EveryShipout{\\ifodd\\c@page\\else\\pdfpageattr{/Rotate 180}\\fi}%%
-	\\fi
-	\\ifxetex
-	\\EveryShipout{\\ifodd\\c@page\\special{pdf: put @thispage << /Rotate 180 >>}%%
-	\\fi
-	}
-	\\fi
-	\\makeatother
-	\\begin{document}
-	\\includepdf[pages=-, nup=1x2, booklet=true, landscape]{%s}
-	\\end{document}' "$INPUTPDF" > /tmp/tmp$$.tex
 	cd /tmp || exit
 	pdflatex /tmp/tmp$$.tex
 	only_filename="$(echo "$file" | awk -F/ '{print $NF}')"