Tidy up compiled method.

Document the meaning of fields, in particular their meaning for quick or
portable.
Make symbol const.
Document kAccConstructor in modifiers applies to both <init> and <clinit>.

Change-Id: Ib42dd6e7db3759c11ea222f9bc72cb00356fad62
diff --git a/src/modifiers.h b/src/modifiers.h
index 78ba140..a15b096 100644
--- a/src/modifiers.h
+++ b/src/modifiers.h
@@ -42,7 +42,7 @@
 
 static const uint32_t kAccJavaFlagsMask = 0xffff;  // bits set from Java sources (low 16)
 
-static const uint32_t kAccConstructor = 0x00010000;  // method (dex only)
+static const uint32_t kAccConstructor = 0x00010000;  // method (dex only) <init> and <clinit>
 static const uint32_t kAccDeclaredSynchronized = 0x00020000;  // method (dex only)
 static const uint32_t kAccClassIsProxy = 0x00040000;  // class (dex only)
 // TODO: JACK CLASS ACCESS (HACK TO BE REMOVED)