C++: Rename NewPlacementAST to ExpressionListParenAST.

It'll be reused as the initializer expression for declarators
that are followed by "( expression-list )".

Change-Id: I6c76a76641941874ef1ed21daa7b6e057c6d170f
Reviewed-by: hjk <qthjk@ovi.com>

src/libs/3rdparty/cplusplus/ASTMatcher.cpp

@@ -1492,7 +1492,7 @@ bool ASTMatcher::match(NamespaceAliasDefinitionAST *node, NamespaceAliasDefiniti
     return true;
 }
 
-bool ASTMatcher::match(NewPlacementAST *node, NewPlacementAST *pattern)
+bool ASTMatcher::match(ExpressionListParenAST *node, ExpressionListParenAST *pattern)
 {
     (void) node;
     (void) pattern;