org-entities: Change smile and frown

* org-entities.el (org-entities): Reinterpret smile and frown entities.

See: https://en.wikipedia.org/wiki/Cap_product,
     https://en.wikipedia.org/wiki/Cup_product

lisp/org-entities.el

@@ -338,6 +338,8 @@ packages to be loaded, add these packages to `org-latex-packages-alist'."
      ("vee" "\\vee" t "∨" "[logical or]" "[logical or]" "∨")
      ("cap" "\\cap" t "∩" "[intersection]" "[intersection]" "∩")
      ("cup" "\\cup" t "∪" "[union]" "[union]" "∪")
+     ("smile" "\\smile" t "⌣" "[cup product]" "[cup product]" "⌣")
+     ("frown" "\\frown" t "⌢" "[Cap product]" "[cap product]" "⌢")
      ("int" "\\int" t "∫" "[integral]" "[integral]" "∫")
      ("therefore" "\\therefore" t "∴" "[therefore]" "[therefore]" "∴")
      ("there4" "\\therefore" t "∴" "[therefore]" "[therefore]" "∴")
@@ -493,8 +495,6 @@ packages to be loaded, add these packages to `org-latex-packages-alist'."
      ("rlm" "" nil "‏" "" "" "‏")
 
      "** Smilies"
-     ("smile" "\\smile" t "⌣" ":-)" ":-)" "⌣")
-     ("frown" "\\frown" t "⌢" ":-(" ":-(" "⌢")
      ("smiley" "\\ddot\\smile" t "☺" ":-)" ":-)" "☺")
      ("blacksmile" "\\ddot\\smile" t "☻" ":-)" ":-)" "☻")
      ("sad" "\\ddot\\frown" t "☹" ":-(" ":-(" "☹")