Implement running user defined list of passes

Implement running user defined list of passes

This change introduces new dex2oat switch --run-passes=. This switch
accepts path to a text file with names of passes to run.
Compiler will run optimization passes specified in the file rather
then the default ones.

There is no verification implemented on the compiler side. It is user's
responsibility to provide a list of passes that leads to successful
generation of correct code. Care should be taken to prepare a list
that satisfies all dependencies between optimizations.

We only take control of the optional optimizations. Codegen (builder),
and all passes required for register allocation will run unaffected
by this mechanism.

Change-Id: Ic3694e53515fefcc5ce6f28d9371776b5afcbb4f