overlay: overlay the overlay with moar overlays

We need to overlay our own verizon eri.xml's these break other devices (namely toro)
by causing a roaming icon. Without them, we get "Roaming Indicator Off" instead of
"Verizon Wireless". Which I'm fine with, but most end users stab me over it.

Need to switch to using PRODUCT_PACKAGES_OVERLAY instead of DEVICE_PACKAGES_OVERLAY
or it won't take precedence.

Change-Id: Ieba26464ae1872644de213544bd970a9cdd46efc
overlay: use DEVICE_PACKAGE_OVERLAYS

This is the old behavior. It was included in a commit
that overrode vendor/cm which we don't need to do anymore.

Change-Id: I64ebb5b9e60124359f875c291429839d7c8d7282
qcom-common: allow multiple hardware tunables includes

Change-Id: I95773d0442cc64027d52c037c86675c6c012b2e4
Merge "overlay: use DEVICE_PACKAGE_OVERLAYS" into cm-11.0
overlay: add sprint eri.xml for mcc310/mnc120

Change-Id: I682343a057c6c784523d5c298425474f8c7923bb
Merge remote-tracking branch 'upstream/cm-11.0' into cm-11.0