Update change log and spec for wrt-plugins-tizen_0.2.78

Update change log and spec for wrt-plugins-tizen_0.2.78

Changed Modules : LBS, Time and Alarm

[Version] 0.2.78
[Project] GT-I8800, Public
[Title] SEL Verification
[Team] WebAPI
[BinType] PDA
[Customer] Open

[Issue#] N_SE-8909 N_SE-8951
[Problem] LBS - in kitchensink sampleApp, there is no action at pressing button
[Cause] handle native error inproperly
[Solution] handle error code properly

[Issue#] N/A
[Problem] Time - If changing timezone in setting after launching Webapp, the webapp can't get new timezone.
[Cause] It is the limitation of ICU.
[Solution] It'll register callback that is called when timezone is changed. If callback is called, it will set default timezone to changed timezone.

[SCMRequest] N/A

Change-Id: Ia9f22e69c8d57b9eaf782001fee472641f8bb0cb