[rpm] Run unit tests before creating .rpm
[unit] Fix EF_PNN unit test

Correct the encoding of the existing test case, and add a second test (the latter is based on Canonical rilmodem code).
[unit] SMS decoding tests for Unicode
[rilmodem] Minor rilmodem/sim.c mem leak fix

Signed-off-by: Tommi Kenakkala <tommi.kenakkala@oss.tieto.com>