Add compiler option for counting hotness in compiled code.

For eventually easier profiling of boot classpath and
system server.

bug: 30934496
Test: 674-hotness-compiled

Change-Id: I0f63c644527b74f6ef2649f481c2a1c731bb9f21
diff --git a/compiler/driver/compiler_options.cc b/compiler/driver/compiler_options.cc
index 1780b1d..2d82d79 100644
--- a/compiler/driver/compiler_options.cc
+++ b/compiler/driver/compiler_options.cc
@@ -60,6 +60,7 @@
       dump_cfg_append_(false),
       force_determinism_(false),
       deduplicate_code_(true),
+      count_hotness_in_compiled_code_(false),
       register_allocation_strategy_(RegisterAllocator::kRegisterAllocatorDefault),
       passes_to_run_(nullptr) {
 }