APN: Update

Update StraightTalk AT&T
https://github.com/CyanogenMod/android_vendor_cm/commit/df0d20d807c3f53d87ead80dc3f8c5e8d039b59c

Add Lycamobile PT MVNO apn" into cm-10.1
https://github.com/CyanogenMod/android_vendor_cm/commit/8cb806c79ac9f84a02b069401eb2def2fb19be5d