Added Matrox Mystique emulation. This is a work in progress, and has a few known

issues :
- Only YUV supported for scaled ILOAD operations
- Several BLTMOD formats missing
- Bad texturing in Actua Soccer
- Flickering in Croc (broken vsync waiting?)
- Turok doesn't swap buffers correctly
- Some missing features

src/Makefile.mingw-wx-sdl2-network

@@ -33,7 +33,7 @@ OBJ = 386.o 386_common.o 386_dynarec.o 386_dynarec_ops.o 808x.o 82091aa.o acc203
 	vid_ati_eeprom.o vid_ati_mach64.o vid_ati18800.o vid_ati28800.o vid_ati68860_ramdac.o vid_cga.o \
 	vid_cl5429.o vid_colorplus.o vid_compaq_cga.o vid_ega.o vid_et4000.o vid_et4000w32.o \
 	vid_et4000w32i.o vid_genius.o vid_hercules.o vid_ht216.o vid_icd2061.o vid_ics2595.o vid_im1024.o vid_incolor.o vid_mda.o \
-	vid_olivetti_m24.o vid_oti037.c vid_oti067.o vid_paradise.o vid_pc1512.o vid_pc1640.o vid_pc200.o \
+	vid_mga.o vid_olivetti_m24.o vid_oti037.c vid_oti067.o vid_paradise.o vid_pc1512.o vid_pc1640.o vid_pc200.o \
 	vid_pcjr.o vid_pgc.o vid_ps1_svga.o vid_s3.o vid_s3_virge.o vid_sdac_ramdac.o vid_sigma.o vid_stg_ramdac.o vid_svga.o \
 	vid_svga_render.o vid_t1000.o vid_t3100e.o vid_tandy.o vid_tandysl.o vid_tgui9440.o \
 	vid_tkd8001_ramdac.o vid_tvga.o vid_unk_ramdac.o vid_vga.o vid_voodoo.o vid_wy700.o video.o \