Get the alpha order of lexer keywords right

Two keywords violate the ordering. Should someone depend on the
alpha order in the future (because the `keyword_length_*` arrays
seem to be ordered)` then this issue will be a nightmare to debug.
Better get this right now.

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu

Author: akosthekiss

jerry-core/parser/js/js-lexer.c

@@ -359,8 +359,8 @@ static const keyword_string_t keyword_length_7[6] =
   LEXER_KEYWORD ("default", LEXER_KEYW_DEFAULT),
   LEXER_KEYWORD ("extends", LEXER_KEYW_EXTENDS),
   LEXER_KEYWORD ("finally", LEXER_KEYW_FINALLY),
-  LEXER_KEYWORD ("private", LEXER_KEYW_PRIVATE),
   LEXER_KEYWORD ("package", LEXER_KEYW_PACKAGE),
+  LEXER_KEYWORD ("private", LEXER_KEYW_PRIVATE),
   LEXER_KEYWORD_END ()
 };
 
@@ -390,8 +390,8 @@ static const keyword_string_t keyword_length_9[3] =
  */
 static const keyword_string_t keyword_length_10[3] =
 {
-  LEXER_KEYWORD ("instanceof", LEXER_KEYW_INSTANCEOF),
   LEXER_KEYWORD ("implements", LEXER_KEYW_IMPLEMENTS),
+  LEXER_KEYWORD ("instanceof", LEXER_KEYW_INSTANCEOF),
   LEXER_KEYWORD_END ()
 };