Update Ace to 29-04-2014

Updates ACE to commit: 4949e18f00e4dbf34fc8a213909ef6ae3e1a1015

This includes fixes for IE7/8 support, which was broken in the last ACE
release. Specifically
https://github.com/ajaxorg/ace/commit/051128c16ff939d329eb0aa4ba9d9d511211b1b7#diff-502b909e9de186749df3051f8d4bfa42L137

Bug: 64559
Change-Id: I0765c5f95de81a5ce9632f6eb5422b98c02941ff