dx11: use faster clipping algorithm for modifier volumes
dx11: modifier volumes need cull mode. Fixes Daytona shadows.
win: the fault handler was treating some software exceptions as fatal (msvc)
uwp: remove async hacks and disable MS task wait exception. Fixes error reporting when loading a game.
delegate to previous signal handler, proper abort for win32
arm32: use builtin gcc __clear_cache
dyna/driver.cpp: no need for a code buffer in win32, cleanup
flyinghead