qcom-common: allow mQANElements to be over-rided

Not all RIL blobs supply multiple of 5 strings. Allow it to be changed by a property

Change-Id: I0135768ae9b439b08278afb49ba91db3fb2dd463
Signed-off-by: Varun Chitre <varun.chitre15@gmail.com>
Merge pull request #20 from CyanogenMod/cm-12.0

qcom-common: allow mQANElements to be over-rided