Use OLDBINUTILS conditional to disable assembler code unsupported by older GNU assmebler for x86_64.inc as in cpu.pp to allow use for openbsd for instance

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23355 3ad0048d-3df7-0310-abae-a5850022a9f2
Move the handling of "misstyled" floating point constants like "2." or "2.e10" from the scanner to the parser. This way type helpers calls for integer constants can be parsed correctly in the future.

Note: the error messages for incorrect "misstyled" floating point numbers (e.g. "2e10foo") have changed because of this.

scanner.pas, tscannerfile.readtoken:
  instead of tokenizing "2.", "2.e10", "2.e+10" and "2.e-10" as "_REALNUMBER" tokenize them as "_INTCONST _POINT", "_INTCONST _POINT _ID", "_INTCONST _POINT _ID _PLUS _INTCONST" "_INTCONST _POINT _ID _PLUS _INTCONST"; tokenizing of normal floating constants is not changed

pexpr.pas:
  factor: 
    * extract the code for creating a new constant floating point from "factor" into a new function "real_const_node_from_pattern"
    + allow the parsing of postfixoperators for integer constants if a "." is encountered
  + postfixoperators: check for a "misstyled" floating point number if an ordinal const (not an enum and not a boolean) is encountered (the code is already partially prepared for type helper support)
  
+ Added tests

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23356 3ad0048d-3df7-0310-abae-a5850022a9f2