ENYO-3644 and ENYO-3664.

- build.js: Added some logic to prevent targetSDK version to be set to "None". None is equivalent to no value, and no value should not make it in config.xml for this particular attribute (PhoneGap would deal with the issue).
- PhonegapUIRows.js: I changed the logic of the updateConfigurationValue control. Min SDK, max SDK and targetSDK are all linked. the rules is min <= target <= max. Corrected a minor bug that prevented the correction of a bad max/min SDK version by using the other control (resp min/max)
- PhonegapUiData: added new SDK API version 19

solve ENYO-3644 and ENYO-3664

Enyo-DCO-1.1-Signed-off-by: Francois Connetable francois.connetable@hp.com