Add LOCAL_SANITIZE_RECOVER.

This is needed for projects that have known ubsan issues that we can't
fix right away (perhaps because it's an upstream project that we're
diligent about keeping in sync with upsteam).

Also make the normal ubsan use -fno-sanitize-recover=all by default.

Change-Id: I1b0f3309792f32dbd08c18816d7306e76c8d7c30