Revert "Revert "Revert "Handle LTO like how AOSP handles FDO."""

This reverts commit 1d31a97aab89bc9bf25ee4178542f924a91cb50d.
Revert "Revert "Revert "This is not the flag you are looking for..."""

This reverts commit a540feaa4d24d4df1dddfb186c8fa66ee6b1347e.
Revert "Revert "Revert "And so begins the LTO experiment..."""

This reverts commit 796def7425ad9a2f81ccefc2229e948dbfee2ea5.