Some cleanup post QGetTlsAddr commit
* remove useless commented line in hgtls.vgtest
* avoid some #ifdef in arch specific code, hoping to discover more compile
  time errors.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14287 a5019735-40e9-0310-863c-91ae7b9d1cf9