Bug 1359733 - (pt. 2.1) Move remaining test files
Tried to do the reverse order (move files then edit), but
reviewboard didn't seem to like me trying to undo what I had
already done. This should at least make the diffs clean though.
MozReview-Commit-ID: Ibcgg2Mc6MT
rename from browser/base/content/test/appUpdate/downloadPage.html
rename to toolkit/mozapps/update/tests/browser/downloadPage.html
rename from browser/base/content/test/appUpdate/head.js
rename to toolkit/mozapps/update/tests/browser/head.js
rename from browser/base/content/test/appUpdate/testConstants.js
rename to toolkit/mozapps/update/tests/browser/testConstants.js