cm: World Phone support

* combine apns
* leave cdma/gsm files intact but empty until the calls
* are removed from devices cm.mk

Change-Id: I0686ef4ee1fe9b34ac9beaaa2bd43555234f4f6d
(cherry picked from commit 413017b57d9f3c8e239e17cbf68ffcf47610940d)
apns: add 8ta APN

Add South Africa newest cellphone provider 8ta.com/telkommobile.co.za
APN values

Change-Id: If2f0c593c41c9c9d8c57d14602ee7304ba735fb0
(cherry picked from commit a42a665b893698c94f7048af181a2c905dd3082d)