Fix oatdump "compilercallbacks" option for runtime.

The "compilercallbacks" runtime option replaced "compiler"
in I708ca13227c809e07917ff3879a89722017e83a9 .

Fix a comment in codegen_util.cc .

Change-Id: I2c5ebd56dd96f0ee8e62b602bfe45357565471ff
2 files changed