Move hard-coded worker url out of libtextsecure

// FREEBIE

js/background.js

@@ -33,7 +33,7 @@
     });
 
     // start a background worker for ecc
-    textsecure.protocol_wrapper.startWorker();
+    textsecure.protocol_wrapper.startWorker('/js/libsignal-protocol-worker.js');
 
     extension.onLaunched(function() {
         console.log('extension launched');

js/libtextsecure.js

@@ -35429,8 +35429,8 @@ Internal.SessionLock.queueJobForNumber = function queueJobForNumber(number, runJ
 
     window.textsecure = window.textsecure || {};
     window.textsecure.protocol_wrapper = {
-        startWorker: function() {
+        startWorker: function(url) {
-            protocolInstance.startWorker('/js/libsignal-protocol-worker.js');
+            protocolInstance.startWorker(url);
         },
         stopWorker: function() {
             protocolInstance.stopWorker();

libtextsecure/protocol_wrapper.js

@@ -11,8 +11,8 @@
 
     window.textsecure = window.textsecure || {};
     window.textsecure.protocol_wrapper = {
-        startWorker: function() {
+        startWorker: function(url) {
-            protocolInstance.startWorker('/js/libsignal-protocol-worker.js');
+            protocolInstance.startWorker(url);
         },
         stopWorker: function() {
             protocolInstance.stopWorker();