Add patchoat tool to Art.

Add a new executable called patchoat to art. This tool takes already
compiled images and oat files and changes their base address, acting as
a cheap form of relocation.

Add a --include-patch-information flag to dex2oat and code to add
required patch information to oat files created with the quick compiler.

https://android.googlesource.com/platform/art/+/53cb16b98acf3cf6f3a1e2204ad4958ecf1b5a3c