stdenv/stripHash: print to stdout, not to variable

`stripHash` documentation states that it prints out the stripped name to
the stdout, but the function stored the value in `strippedName`
instead.

Basically all usages did something like
`$(stripHash $foo | echo $strippedName)` which is just braindamaged.
Fixed the implementation and all invocations.

pkgs/tools/typesetting/tex/nix/animatedot.sh

@@ -4,6 +4,6 @@ mkdir -p $out
 
 for ((i = 1; i <= $nrFrames; i++)); do
     echo "producing frame $i...";
-    targetName=$out/$(basename $(stripHash $dotGraph; echo $strippedName) .dot)-f-$i.dot
+    targetName=$out/$(basename $(stripHash $dotGraph) .dot)-f-$i.dot
     cpp -DFRAME=$i < $dotGraph > $targetName
 done

pkgs/tools/typesetting/tex/nix/default.nix

@@ -185,7 +185,7 @@ rec {
         if test -d $postscript; then
           input=$(ls $postscript/*.ps)
         else
-          input=$(stripHash $postscript; echo $strippedName)
+          input=$(stripHash $postscript)
           ln -s $postscript $input
         fi
 

pkgs/tools/typesetting/tex/nix/dot2pdf.sh

@@ -4,7 +4,7 @@ mkdir -p $out
 
 dot2pdf() {
     sourceFile=$1
-    targetName=$out/$(basename $(stripHash $sourceFile; echo $strippedName) .dot).pdf
+    targetName=$out/$(basename $(stripHash $sourceFile) .dot).pdf
     echo "converting $sourceFile to $targetName..."
     export FONTCONFIG_FILE=$fontsConf
     dot -Tpdf $sourceFile > $targetName

pkgs/tools/typesetting/tex/nix/dot2ps.sh

@@ -4,7 +4,7 @@ mkdir -p $out
 
 dot2ps() {
     sourceFile=$1
-    targetName=$out/$(basename $(stripHash $sourceFile; echo $strippedName) .dot).ps
+    targetName=$out/$(basename $(stripHash $sourceFile) .dot).ps
     echo "converting $sourceFile to $targetName..."
     dot -Tps $sourceFile > $targetName
 }

pkgs/tools/typesetting/tex/nix/lhs2tex.sh

@@ -10,7 +10,7 @@ cd $startDir
 
 lhstex() {
     sourceFile=$1
-    targetName=$out/$(basename $(stripHash $sourceFile; echo $strippedName) .lhs).tex
+    targetName=$out/$(basename $(stripHash $sourceFile) .lhs).tex
     echo "converting $sourceFile to $targetName..."
     lhs2TeX -o "$targetName" $flags "$sourceFile"
 }

pkgs/tools/typesetting/tex/nix/run-latex.sh

@@ -16,11 +16,11 @@ for i in $extraFiles; do
     if test -d $i; then
         ln -s $i/* .
     else
-        ln -s $i $(stripHash $i; echo $strippedName)
+        ln -s $i $(stripHash $i)
     fi
 done
 
-rootName=$(basename $(stripHash "$rootFile"; echo $strippedName))
+rootName=$(basename $(stripHash "$rootFile"))
 
 rootNameBase=$(echo "$rootName" | sed 's/\..*//')