add exmimo octave api env to TDD rec proj

targets/PROJECTS/TDDREC/s_init_params.m

 clear all
 close all
 addpath([getenv('OPENAIR_TARGETS') '/ARCH/EXMIMO/USERSPACE/OCTAVE']);
+addpath([getenv('OPENAIR_DIR') '/cmake_targets/lte_build_oai/build']);
 
 %% -------- ExpressMIMO2 configuration --------
 limeparms;