Move the rest of the preprocessor terminology from 'instantiate' and
variants to 'expand'. This changed a couple of public APIs, including
one public type "MacroInstantiation" which is now "MacroExpansion". The
rest of the codebase was updated to reflect this, especially the
libclang code. Two of the C++ (and thus easily changed) libclang APIs
were updated as well because they pertained directly to the old
MacroInstantiation class.

No functionality changed.

llvm-svn: 135139
diff --git a/clang/lib/Serialization/ASTReader.cpp b/clang/lib/Serialization/ASTReader.cpp
index e8a5c41..e37083a 100644
--- a/clang/lib/Serialization/ASTReader.cpp
+++ b/clang/lib/Serialization/ASTReader.cpp
@@ -1560,13 +1560,13 @@
     if (PreprocessedEntity *PE = PPRec.getPreprocessedEntity(Record[0]))
       return PE;
     
-    MacroInstantiation *MI
-      = new (PPRec) MacroInstantiation(DecodeIdentifierInfo(Record[3]),
+    MacroExpansion *ME =
+      new (PPRec) MacroExpansion(DecodeIdentifierInfo(Record[3]),
                                  SourceRange(ReadSourceLocation(F, Record[1]),
                                              ReadSourceLocation(F, Record[2])),
-                                       getMacroDefinition(Record[4]));
-    PPRec.SetPreallocatedEntity(Record[0], MI);
-    return MI;
+                                 getMacroDefinition(Record[4]));
+    PPRec.SetPreallocatedEntity(Record[0], ME);
+    return ME;
   }
       
   case PPD_MACRO_DEFINITION: {