apps/system/utils/tzselect: change the overwrite value in setenv
apps/system/utils/tzselect: change the overwrite value in setenv

- in utils_tzselect.c, change the overwrite value as 1 in setenv() to select the TZ multiple times because if overwrite value is 0 then we can select the TZ only once, again overwriting is not allowed.

Signed-off-by: Deepak Sharma <1de9206db25b6e898fdbc4f964ecf29803647af5@samsung.com>

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