Clean up the dumpvar output during builds [1/2]

This changes the alignment of the entries and adds
in one line for the name of the device being built
as would be known by the general public.

The name of the product will be in:

/device/samsung/mondrianwifi/cm.mk

The entry is:

PRODUCT_RETAIL_NAME := Retail device name here

This commit will work independently of the device
entry.  If nothing is specified in the device entry
the line will simply show nothing after the info line.