adding a new option --noS1 to build_script that will now either compile the softmodem or oaisim with or without the S1 interface (instead of doing both of them)
also for the noS1 target the options -w -x -V -r are now passed from the build script to the CMakeList.txt file and does not need to be set manually anymore
fixed a bug for the EXMIMO tools build



git-svn-id: http://svn.eurecom.fr/openair4G/trunk@7706 818b1a75-f10b-46b9-bf7c-635c3b92a50f