Fix handling of end-anchor in redirect patterns

Related issue:
- https://github.com/uBlockOrigin/uBlock-issues/issues/872

An end-anchor was treated as literal `|` in the redirect
pattern to match instead of as a end-of-string condition.

src/js/redirect-engine.js

@@ -446,6 +446,7 @@ RedirectEngine.prototype.compileRuleFromStaticFilter = function(line) {
                 .replace(/\*/g, '[\\w.%-]*')
                 .replace(/\./g, '\\.') +
             path
+                .replace(/\|$/, '$')
                 .replace(/[.+?{}()|[\]\/\\]/g, '\\$&')
                 .replace(/\^/g, '[^\\w.%-]')
                 .replace(/\*/g, '.*?');