Dummy up MOV instructions, add/tweak comments.

Also reorder some things to help me see them on screen at the same time.

Change-Id: I398b46410f73d7853b5a1734f5c2a9e256b981bf
diff --git a/src/compiler/codegen/arm/ArmLIR.h b/src/compiler/codegen/arm/ArmLIR.h
index db2d6e8..bc85dd8 100644
--- a/src/compiler/codegen/arm/ArmLIR.h
+++ b/src/compiler/codegen/arm/ArmLIR.h
@@ -285,8 +285,8 @@
 
 /*
  * The following enum defines the list of supported Thumb instructions by the
- * assembler. Their corresponding snippet positions will be defined in
- * Assemble.c.
+ * assembler. Their corresponding EncodingMap positions will be defined in
+ * Assemble.cc.
  */
 typedef enum ArmOpcode {
     kPseudoSuspendTarget = -15,