feat(conf2uedata): uses nvram and usim binary

This commit reverts behaviour of data generation as before
commit 7207c65b05fd812a18371827f2bfb1431fc58696:

    fix .ue* filenames in scripts and documentation

    TODO add option to conf2uedata and adapt script

cmake_targets/tools/build_helper

@@ -450,13 +450,23 @@ install_asn1c_from_source(){
 ################################################
 
 install_nas_tools() {
-  if [ ! -f $2/.ue.nvram0 -o ! -f $2/.usim.nvram0 ]; then
-    cd $OPENAIR_DIR/targets/bin
-    ./conf2uedata -c $1 -o $2
-    echo_success "$1 $2"
+  if [ ! -f .ue.nvram0 ]; then
+    echo_success "generate .ue_emm.nvram .ue.nvram"
+    ./nvram --gen -c $1 -o $2
+  else
+    [ ./nvram -nt .ue.nvram0 -o ./nvram -nt .ue_emm.nvram0 ] && ./nvram --gen -c $1 -o $2
   fi
+
+  if [ ! -f .usim.nvram0 ]; then
+    echo_success "generate .usim.nvram"
+    ./usim --gen -c $1 -o $2
+  else
+    [ ./usim -nt .usim.nvram0 ] && ./usim --gen -c $1 -o $2
+  fi
+
 }
 
+
 ################################
 # set_openair_env
 ###############################