m8: set partition sizes from gpe

* GPE partition sizes are considerably smaller than carrier
  versions. Use the smaller ones so block based update zips
  don't fail.

Change-Id: If89739e809c8c37a1d5082d3b4e066ede3b1685c
props: update widevine blobs from hammerhead-lrx21o-factory-01315e08

Change-Id: I7a27a721ba36487ef393fb7927bd526022a7653f
Merge "m8: set partition sizes from gpe" into lp5.0
Merge "props: update widevine blobs from hammerhead-lrx21o-factory-01315e08" into lp5.0