submit/tizen_2.0/20121229.051323

[Version] 0.2.88
[Project] GT-I8800
[Title] Release wrt-commons_0.2.88
[Issue#] N/A
[Problem] N/A
[Cause] N/A
[Solution] Current realization is define const to each source code for vconf
key which is used in the setting value. This commit create common inline
function for vconf key path builder.
[SCMRequest] N/A