samsung: add libril for xmm626x modems

Change-Id: I3064271ac8d563f63b13278944639ab5a29ae87f
samsung: libril: cleanup debugging code

Change-Id: I1429a892071dbd55d8ffa41b304b1612261f4edc
Merge branch 'cm-10.1' of github.com:CyanogenMod/android_hardware_samsung into HEAD