[desktop] Fix desktop file icon

Signed-off-by: Matti Kosola <matti.kosola@jolla.com>
[systemd] Clean up service file for nemo user session

Signed-off-by: Matti Kosola <matti.kosola@jolla.com>
[rpm] Add executable bit for exec_phonesim

Signed-off-by: Matti Kosola <matti.kosola@jolla.com>
[rpm] Depend on phonesim-configs package

Signed-off-by: Matti Kosola <matti.kosola@jolla.com>