parse.y: Preserve previous line and restore it when read '\n'

* parse.y (parser_params): Add prevline to store previous line.
* parse.y (yycompile0): Initialize prevline with 0.
* parse.y (parser_nextline): Store previous line on prevline.
* parse.y (parser_nextc): Check parser is on EOF or has nextline.
  Now parser_yylex does not always set lex_p as lex_pend, we should check
  EOF flag and nextline is set.
* parse.y (parser_yylex): Restore previous line, set lex_p and tokp
  on '\n'. Before this commit, tokp is on the head of next line of '\n'
  and lex_p is on the tail of next line when next token is '\n'.
  By this behavior, in some case the last column of NODE_CALL (or NODE_QCALL) is
  set to the last column of next line. NODE_CALL can be generated
  via `primary_value call_op operation2 {} opt_paren_args` and opt_paren_args
  can be none. If none is generated with next token '\n', the last column of
  none is set to the last column of next line.

  e.g. :

  ```
  a.b
  cd.ef
  ```

  The location of NODE_CALL of first line is set to,

  * Before

  ```
  NODE_CALL (line: 1, first_lineno: 1, first_column: 0, last_lineno: 1, last_column: 6)
  ```

  * After

  ```
  NODE_CALL (line: 1, first_lineno: 1, first_column: 0, last_lineno: 1, last_column: 3)
  ```

* parse.y (parser_mark): GC mark prevline.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60780 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

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