Add falcon_gpe to asserts

Change-Id: Idfc1560f6de7ec835bea38b7ecc7e073281182ab
Revert "Make gpe-boot.img and include as system/gpe-boot.img for install"

This reverts commit 7b5b6773e269afc0f89f07e7492a193d7b068459.
Swap fstab at init if GPE

Change-Id: Ied69c3c3cb7bbfb561120862e48dfcf22458e843