Fixed generation of abs calls for thumb and thumb-2 targets.

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@27926 3ad0048d-3df7-0310-abae-a5850022a9f2
  * fixed test on 64 bit platforms

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@27927 3ad0048d-3df7-0310-abae-a5850022a9f2
  * don't generate debug info for class fields in generic types
   -> fixes failed compilation of webtbs/25600 with debug info
      (broken since 6 June, possibly because of r27874)
  * don't allocate class fields defined in generic types, as the
    only reason for this was to have valid debug info

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@27928 3ad0048d-3df7-0310-abae-a5850022a9f2