Fix Apple's iOS 8.0.1 bug

Did Apple's iOS 8.0.1 update break your iPhone?
Here's a fix that works.
According to Apple's release notes, iOS 8.0.1 was
intended to fix numerous problems, including an issue
that held back HealthKit apps last week. iOS 8.0.1 also
patches up issues with third-party keyboards, a bug
that prevented some apps from getting at the photo
library, reliability around Apple's Reachability feature,
and more. The full changelog follows below. To install
the update on your iPhone or iPad, just head into
settings. This one shouldn't require as much space as
the original iOS 8 release.
Fixes a bug so HealthKit apps can now be made
available on the App Store
Addresses an issue where 3rd party keyboards could
become deselected when a user enters their passcode
Fixes an issue that prevented some apps from
accessing photos from the Photo Library
Improves the reliability of the Reachability feature on
iPhone 6 and iPhone 6 Plus
Fixes an issue that could cause unexpected cellular
data usage when receiving SMS/MMS messages
Better support of Ask To Buy for Family Sharing for
In-App Purchases
Fixes an issue where ringtones were sometimes not
restored from iCloud backups
Fixes a bug that prevented uploading photos and
videos from Safari