Release version 1.2.12

Release version 1.2.12

Changes:
 - Fix memory leak
 - Release version 1.2.1
 - Fix errata in doxygen comment
 - Set NULL for appcom handle
 - Fix memory leak
 - Add a new enum value for widget create aborted event
 - Add widget db busy handler
 - Get preview path base on language
 - Fix get widget info bug
 - Find current locale when the incoming parameter 'lang' is null
 - Handle widget abnormal exit
 - Use common fault flag
 - Fix widget list duplication check bug
 - Add a return value of widget_instance_trigger_update API
 - Add period value into bundle
 - Add a function to convert aul error
 - Fix log level and message
 - Fix memory leak
 - Add missing param
 - Reset instance pid when widget app is aborted
 - Receive error code from provider
 - fix coding rule error
 - Release version 1.2.10
 - Remove not supported update script
 - Release version 1.2.11
 - Merge branch 'tizen_3.0' into devel/tizen

Change-Id: I4c21b8b3df2a906f0cca03b09534e9a57e111ac4
Signed-off-by: Hwankyu Jhun <h.jhun@samsung.com>