Fast JNI support.

Use a modifier to signal a native method is a fast JNI method. If the
modifier is set then don't perform runnable transitions.

Change-Id: I7835b4d837bfdd1cb8e2d54b919c0d5e6cf90499
diff --git a/runtime/modifiers.h b/runtime/modifiers.h
index 34f4af8..4e365be 100644
--- a/runtime/modifiers.h
+++ b/runtime/modifiers.h
@@ -46,6 +46,7 @@
 static const uint32_t kAccDeclaredSynchronized = 0x00020000;  // method (dex only)
 static const uint32_t kAccClassIsProxy = 0x00040000;  // class (dex only)
 static const uint32_t kAccPreverified = 0x00080000;  // method (dex only)
+static const uint32_t kAccFastNative = 0x0080000;  // method (dex only)
 
 // Special runtime-only flags.
 // Note: if only kAccClassIsReference is set, we have a soft reference.