Changes the path for fontcustom compile

This recompiles the iconfont to have the correct path and
edits the styleguide path info

Testing:

- When you go to styleguide all the icons should appear

Change-Id: I1a300cd20b9965782771b7eabf8b475bd22f15c2
Reviewed-on: https://gerrit.instructure.com/38135
Reviewed-by: Ryan Shaw <ryan@instructure.com>
Product-Review: Ryan Shaw <ryan@instructure.com>
QA-Review: Ryan Shaw <ryan@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>