Add -verbose:interpreter

Adds a mode to track what methods are being interpreted. Good
for debugging interpreter usage during app startup.

Bug: 130185360
Test: test-art-host

Change-Id: I8119f79e534cdad7d6a72d4f01115a288e9c8d9a
diff --git a/libartbase/base/logging.h b/libartbase/base/logging.h
index 484db87..68ad9fc 100644
--- a/libartbase/base/logging.h
+++ b/libartbase/base/logging.h
@@ -38,6 +38,7 @@
   bool deopt;
   bool gc;
   bool heap;
+  bool interpreter;  // Enabled with "-verbose:interpreter".
   bool jdwp;
   bool jit;
   bool jni;