universal_include.h: remove SDL_syswm.h include
universal_include.h: remove SDL_syswm.h include

Impact: eliminates build failures on Linux

Signed-off-by: Steven Noonan <4068f0880b399410602d694b3cc711c8a8f4727e@uplinklabs.net>

tycho/arc,tycho/arc,tycho/arc