Fix precedence of extension nodes (ocaml#6386).

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@14709 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02

parsing/parser.mly

@@ -453,8 +453,6 @@ The precedences must be listed from low to high.
 %nonassoc below_LBRACKETAT
 %nonassoc LBRACKETAT
 %nonassoc LBRACKETATAT
-%nonassoc LBRACKETPERCENT
-%nonassoc LBRACKETPERCENTPERCENT
 %right    COLONCOLON                    /* expr (e :: e :: e) */
 %left     INFIXOP2 PLUS PLUSDOT MINUS MINUSDOT  /* expr (e OP e OP e) */
 %left     PERCENT INFIXOP3 STAR                 /* expr (e OP e OP e) */
@@ -470,6 +468,7 @@ The precedences must be listed from low to high.
 %nonassoc BACKQUOTE BANG BEGIN CHAR FALSE FLOAT INT INT32 INT64
           LBRACE LBRACELESS LBRACKET LBRACKETBAR LIDENT LPAREN
           NEW NATIVEINT PREFIXOP STRING TRUE UIDENT
+          LBRACKETPERCENT LBRACKETPERCENTPERCENT
 
 
 /* Entry points */