Follow the ELF spec. Use the terms relocatable.

Also, clean up the code.

Change-Id: I135050b1c3072ebb33ea0b48f9e2902c9eccd587
diff --git a/lib/ExecutionEngine/Script.h b/lib/ExecutionEngine/Script.h
index 7fe3e03..ef682a6 100644
--- a/lib/ExecutionEngine/Script.h
+++ b/lib/ExecutionEngine/Script.h
@@ -158,10 +158,10 @@
                           char const *cacheName,
                           unsigned long flags);
 
-    int prepareObject(char const *cacheDir,
-                      char const *cacheName,
-                      llvm::Reloc::Model RelocModel,
-                      unsigned long flags);
+    int prepareRelocatable(char const *cacheDir,
+                           char const *cacheName,
+                           llvm::Reloc::Model RelocModel,
+                           unsigned long flags);
 
     char const *getCompilerErrorMessage();