Update / cleanup testsuite

* Delete tests which cannot be handled by gdc testsuite
  (test9369, fail128) (unicode/BOM)
* Comment shebang lines (not supported by testsuite)
* Move link7745 import to avoid conflict
* Adjust tests as we can not pass arguments to the tests
* template9.d: Test is actually not fixed in 2.062 frontend
* Add "EXTRA_FILES" information

* Port __va_argsave tests

* Port inline asm (this part might be worth a review, but it seems to work...)

BTW: Is it possible that one of the recent commits causes an regression in the testsuite? I don't think I've seen the "conversion to non-scalar type requested" errors in sdtor.d before.