Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

The basic simulator can be replaced with the RF simulator. Use option
--rfsim.

- introduce loader_reset() that frees all memory
- resolve memory leak in loader_format_shlibpath()
- correctly handle library reload: check if a function has been
  retrieved already. Don't leak memory (strdup()), and handle multiple
  reloads of different functions from the same SO

Somehow this file was in a bad state...

Analysis level is green.

- Measure time of deinterleaving, rate unmatching, and LDPC decoding of
  DLSCH decoding
- Add merge_meas() function to merge measurements into one
- Rename time meas variables with "turbo" to "ldpc"

Use --T_stdout 2 to have both.

--T_stdout 0 is still the way to have only T traces and no console logs.

This reverts commit 29268d0a.