fix($browser): don’t use history api when only the hash changes

Fixes a failing test on IE9 caused as a side effect
of 404b95f being merged
before 0656484.

The test should have been independent on the browser running it
and it is now.

Closes angular#9423
Closes angular#9424

Author: tbosch

test/ng/browserSpecs.js

@@ -647,6 +647,9 @@ describe('browser', function() {
       $provide.value('$browser', browser);
       browser.pollFns = [];
 
+      sniffer.history = true;
+      $provide.value('$sniffer', sniffer);
+
       $locationProvider.html5Mode(true);
     }));