[dcl.link] Change "objects" to "entities"

"Entities" is more appropriate since it includes functions.

Author: xmh0511

Diff for: source/declarations.tex

@@ -8699,8 +8699,8 @@
 \pnum
 \indextext{object!linkage specification}%
 \indextext{linkage!implementation-defined object}%
-Linkage from \Cpp{} to objects defined in other languages and to objects
-defined in \Cpp{} from other languages is \impldef{linkage of objects between \Cpp{} and other languages} and
+Linkage from \Cpp{} to entities defined in other languages and to entities
+defined in \Cpp{} from other languages is \impldef{linkage of entities between \Cpp{} and other languages} and
 language-dependent. Only where the object layout strategies of two
 language implementations are similar enough can such linkage be
 achieved.%