Revert "SWAP_FLAG_* constants are now in <sys/swap.h>."

This reverts commit 9d28e5ef9c5ca2bfa08e6043e1645ac65a48d840.
Revert "fs_mgr: Don't run e2fsck inside SDK system images."

This reverts commit 990bb3f7ed4e24709b6e0ec210a93267995e9b7c.
Revert "fs_mgr: disable verified partitions on debuggable devices."

This reverts commit fa94e60a0c7c901ce239c373349de89bf951f0a8.