Clean some dex2oat options.

Remove dump-passes inherited from Quick days,
and move dump-timings and dump-stats to CompilerStats.

Test: test.py
Change-Id: Ie79be858a141e59dc0b2a87d8cb5a5248a5bc7af
diff --git a/compiler/driver/compiler_options_map.def b/compiler/driver/compiler_options_map.def
index cccd618..2c56fd7 100644
--- a/compiler/driver/compiler_options_map.def
+++ b/compiler/driver/compiler_options_map.def
@@ -58,5 +58,7 @@
 COMPILER_OPTIONS_KEY (std::string,                 RegisterAllocationStrategy)
 COMPILER_OPTIONS_KEY (ParseStringList<','>,        VerboseMethods)
 COMPILER_OPTIONS_KEY (bool,                        DeduplicateCode,        true)
+COMPILER_OPTIONS_KEY (Unit,                        DumpTimings)
+COMPILER_OPTIONS_KEY (Unit,                        DumpStats)
 
 #undef COMPILER_OPTIONS_KEY