* Some fixes to NASM writer:
  * Correctly output names of sec_user sections and sec_threadvar on Windows targets
  * Use ALIGNB directive to align without warnings in bss and alike sections.
  * Do not output 'begin/end asmlist x' for empty asmlists.


git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@26898 3ad0048d-3df7-0310-abae-a5850022a9f2