Fix that OS test and make deleting dups faster on Windows

Scripts/dedup_bindist.sh

@@ -50,21 +50,22 @@ for dir in $secondary; do
         squish)
             echo -ne "  Deleting dups: " ;;
     esac
-    while read f; do        
-        echo -ne "."
-        # Requires realpath from GNU coreutils:
-        dirof=`dirname $f`
-        relative=`realpath ../runtime/$f --relative-to=$dirof`
-        # echo "ln -sf $relative $f"
-        case $mode in
-            symlink)
-                ln -sf $relative $f ;;
-            squish)
-                rm -f $f ;;
-        esac
-    done < $dups
-    echo
-
+    case $mode in
+        squish)
+            xargs rm -f < $dups
+            ;;        
+        symlink)
+            while read f; do        
+                echo -ne "."
+                # echo "ln -sf $relative $f"
+                # Requires realpath from GNU coreutils:
+                dirof=`dirname $f`
+                relative=`realpath ../runtime/$f --relative-to=$dirof`
+                ln -sf $relative $f
+            done < $dups
+            echo
+            ;;
+    esac
     rm $diffs
     rm $dups
 done

build_dotnetcore_bindist.sh

@@ -78,7 +78,7 @@ buildit $OUTDIR/runtime Ambrosia/Ambrosia/Ambrosia.csproj
 buildit $OUTDIR/coord ImmortalCoordinator/ImmortalCoordinator.csproj
 buildit $OUTDIR/unsafedereg DevTools/UnsafeDeregisterInstance/UnsafeDeregisterInstance.csproj
 pushd $OUTDIR
-ln -s runtime/Ambrosia ambrosia
+ln -s runtime/Ambrosia Ambrosia
 ln -s coord/ImmortalCoordinator
 ln -s unsafedereg/UnsafeDeregisterInstance
 popd
@@ -118,10 +118,10 @@ fi
 # echo "----------------------------------------"
 # chmod -x ./bin/*.dll ./bin/*.so ./bin/*.dylib ./bin/*.a 2>/dev/null || echo 
 
-
+echo 
 echo "Deduplicating output produced by separate dotnet publish calls"
 echo "--------------------------------------------------------------"
-if [ "$OS" == "Windows_NT" ];
+if [ ${OS:-defined} ] && [ "$OS" == "Windows_NT" ];
 then ./Scripts/dedup_bindist.sh squish
 else ./Scripts/dedup_bindist.sh symlink
 fi