Create the new TK_ASTERISK token to represent the "*" in "SELECT *". Formerly

that operator was TK_ALL, which was also used for UNION ALL.  Less confusion if
they operator symbols are distinct.

FossilOrigin-Name: 201ac6d449431dadc6b29faecd68b559bd64bc9f

tool/addopcodes.tcl

@@ -37,6 +37,7 @@ set extras {
   UMINUS
   UPLUS
   REGISTER
+  ASTERISK
   SPACE
   ILLEGAL
 }