Make dex instruction size a lookup.

Add ostream operators for dex instruction enums.
Move simple methods to header file.

Change-Id: I9644bfb975896a491ee73ef9a8ef13c062c5fcbd
diff --git a/build/Android.common.mk b/build/Android.common.mk
index 78743a7..5ca76ac 100644
--- a/build/Android.common.mk
+++ b/build/Android.common.mk
@@ -373,6 +373,7 @@
 
 
 LIBART_ENUM_OPERATOR_OUT_HEADER_FILES := \
+	src/dex_instruction.h \
 	src/heap.h \
 	src/indirect_reference_table.h \
 	src/instruction_set.h \