Reimplement ART_NDEBUG_OPT_FLAG

Use ART_NDEBUG_OPT_FLAG or ART_DEBUG_OPT_FLAG to override the default -O
compiler arguments.

Fixes: 31653144
Test: mmma -j art
Test: m -j dex2oat dex2oatd ART_NDEBUG_OPT_FLAG=-O1 ART_DEBUG_OPT_FLAG=-O0
Change-Id: I9d48d94f5e262148ddac5c70068144a645ac9566
2 files changed