Add CFBundleIdentifier to the bundle Info.plist's

Refactor the current app CFBundleIdentifier support:
handle frameworks as well. Add @BUNDLEIDENTIFIER@
placeholder to the OS X info.plist.lib templates. 

This means the Qt frameworks will now get a valid
CFBundleIdentifier entry the same way as app bundles:
by extracting the identifier prefix from Xcode settings
and appending framework name.

Task-number: QTBUG-32896
Change-Id: Ica8f28332a88e37a823c46fca7a2c373157af020
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>