mozilla-b2g/gonk-misc — pull request #54 by marshall (2012-11-10 04:41:15+00:00)
Title: Initial build support for incremental gecko (OTA) updates

This adds the new make target "gecko-update-incremental", which requires a MAR path to generate an incremental update from.

An example of running this to generate an incremental update:
```
# build update 1
$ VARIANT=user ./build.sh
$ VARIANT=user ./build.sh gecko-update-full
$ mv objdir-gecko/dist/b2g-update/b2g-gecko-update.mar /tmp/update1.mar

# .. make some change in gecko ..

$ VARIANT=user ./build.sh
$ VARIANT=user ./build.sh gecko-update-incremental GECKO_UPDATE_FROM_MAR=/tmp/update1.mar
$ ls -lh objdir-gecko/dist/b2g-update/b2g-gecko-update-incremental.mar
```

r? @mwu