jf: Remove modem links scripts

 * Create the symlinks ourselves at build time. Remounting the system
   partition to do this is just stupid.

Change-Id: I224c20af820554661fe027e5835b18cb5589c694
Merge "jf: Remove modem links scripts" into cm-11.0
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_device_samsung_jflte into cd-4.4