Do not include shell when not enabled
Do not include shell when not enabled

Excluding shell when ENABLE_SHELL config is undefined.

Change-Id: I94dfbc5155d5ccbdd012294ec0848c7f6e4836b3
Signed-off-by: Mikhail Cherkashin <7f4dee552e165dc1d3bfbef9b436e61e974ecb7e@partner.samsung.com>

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