fbp-runner: Do not export SOL_LOG_PRINT_FUNCTION
fbp-runner: Do not export SOL_LOG_PRINT_FUNCTION

Since, the fbp-runner@.service uses env file the runner script should not
export anything.

Signed-off-by: Bruno Bottazzini <c92d71c55f49bd220e26b4af231350d119acce9e@intel.com>

solettaproject/soletta-dev-app,brunobottazzini/soletta-dev-app,solettaproject/soletta-dev-app,solettaproject/soletta-dev-app,brunobottazzini/soletta-dev-app,brunobottazzini/soletta-dev-app