ASM Priority Boost Tool

This tool is a replacement for the Jack plugin that allows injection
of static method calls before lock enter and exit.

A common use case would be to boost a thread's priority as soon as
it acquires a heavily contented lock and resetting the priority upon
release.

This tool is meant to be optionally invoked from /build/core/ rules
during the build process.

Test: JUnit Tests / resulting image on a bullhead.

Change-Id: If400414a0bf50f03768a1de2ebee42086a9d701f