Fixing Generic P pdk builds. Bumping the system image partition size from 550MB to 1 GB.
am: ef98c69342

Change-Id: I1d53d643daa1be45607d2a3971ed0a85034dda83
tree: a8561f3006f133c128034ee9ac5f4b22cece09fe
  1. AndroidProducts.mk
  2. BoardConfig.mk
  3. mini_x86.mk
  4. overlay/