llvm*: remove symlinks to llvm-diff, llvm-as and associated LLVM IR utilities.

These llvm-prefixed utilities are not drop-in replacements for the utilities
with similar names, they are specifically for operating on LLVM IR files.
Symlinking these without the prefix causes incompatibilities with tools that
expect diff, as and others to behave normally.

pkgs/development/compilers/llvm/10/bintools.nix

@@ -11,7 +11,6 @@ in runCommand "llvm-binutils-${version}" { preferLocalBuild = true; } ''
      ln -s $prog $out/bin/${prefix}$(basename $prog)
    done
    for prog in ${llvm}/bin/*; do
-     ln -s $prog $out/bin/${prefix}$(echo $(basename $prog) | sed -e "s|llvm-||")
      ln -sf $prog $out/bin/${prefix}$(basename $prog)
    done
    rm -f $out/bin/${prefix}cat

pkgs/development/compilers/llvm/7/bintools.nix

@@ -11,7 +11,6 @@ in runCommand "llvm-binutils-${version}" { preferLocalBuild = true; } ''
      ln -s $prog $out/bin/${prefix}$(basename $prog)
    done
    for prog in ${llvm}/bin/*; do
-     ln -s $prog $out/bin/${prefix}$(echo $(basename $prog) | sed -e "s|llvm-||")
      ln -sf $prog $out/bin/${prefix}$(basename $prog)
    done
    rm -f $out/bin/${prefix}cat

pkgs/development/compilers/llvm/8/bintools.nix

@@ -11,7 +11,6 @@ in runCommand "llvm-binutils-${version}" { preferLocalBuild = true; } ''
      ln -s $prog $out/bin/${prefix}$(basename $prog)
    done
    for prog in ${llvm}/bin/*; do
-     ln -s $prog $out/bin/${prefix}$(echo $(basename $prog) | sed -e "s|llvm-||")
      ln -sf $prog $out/bin/${prefix}$(basename $prog)
    done
    rm -f $out/bin/${prefix}cat

pkgs/development/compilers/llvm/9/bintools.nix

@@ -11,7 +11,6 @@ in runCommand "llvm-binutils-${version}" { preferLocalBuild = true; } ''
      ln -s $prog $out/bin/${prefix}$(basename $prog)
    done
    for prog in ${llvm}/bin/*; do
-     ln -s $prog $out/bin/${prefix}$(echo $(basename $prog) | sed -e "s|llvm-||")
      ln -sf $prog $out/bin/${prefix}$(basename $prog)
    done
    rm -f $out/bin/${prefix}cat