Add a new variant device jfltezm.

jfltezm is China Mobile edition Samsug galaxy S4.
It's known as Samsung GT-I9508.
jfltezm's hardware is the same with jfltexx, but support TD-SCDMA network.

Change-Id: I3088e1c996fe312594e1fba1dbddf60aa87289d1
Revert "jf: don't build without proprietary blobs"

This reverts commit 2964c9f610ad9399967b5a4fd942065a3be0be6a.

Change-Id: I22cd2909875d8f7e476e87c2ee4226509aebe6b5
jf-common: update wpa_supplicant config

Fixes issue where wifi is slow for the
first few minutes after connect or toggle

PS2: Add Overlay config files as per Dan's CM11 Commit

Change-Id: I5c128fe167dca760f350cdd34ea7891d0262614f
jf: remove gsm/cdma overlay dirs

Change-Id: I91946184addf6039bda1c4c0fdb8350626f2bfe4
jf: update sepolicy

Change-Id: I3e8fa10e12a30d61b57b46bc1ba7c66a695fb4d7
jf: set sepolicy permissive for now

Change-Id: I841fcaa24227ee9c4181cd6dc07726aac9b3d47a