Rename callee save enumerators.

And related image method enumerators, macros, etc.
Clean up some entrypoint assembly comments.

This is a follow-up to
    https://android-review.googlesource.com/252348

Test: Run ART test suite on host and Nexus 9.
Bug: 30212852
Change-Id: I2707342d4255c88c547655be83ed97a67e12ae9e
diff --git a/oatdump/oatdump.cc b/oatdump/oatdump.cc
index a0def61..77730b9 100644
--- a/oatdump/oatdump.cc
+++ b/oatdump/oatdump.cc
@@ -73,9 +73,9 @@
   "kResolutionMethod",
   "kImtConflictMethod",
   "kImtUnimplementedMethod",
-  "kCalleeSaveMethod",
-  "kRefsOnlySaveMethod",
-  "kRefsAndArgsSaveMethod",
+  "kSaveAllCalleeSavesMethod",
+  "kSaveRefsOnlyMethod",
+  "kSaveRefsAndArgsMethod",
   "kSaveEverythingMethod",
 };