Added x87_timings.c/h missing from rev 1492.

src/Makefile.mingw-wx-sdl2

@@ -37,7 +37,7 @@ OBJ = 386.o 386_common.o 386_dynarec.o 386_dynarec_ops.o 808x.o 82091aa.o acc203
 	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 \
-	vt82c586b.o w83877tf.o wd76c10.o x86seg.o x87.o xi8088.c xtide.o win-midi.o wx-main.o \
+	vt82c586b.o w83877tf.o wd76c10.o x86seg.o x87.o x87_timings.o xi8088.c xtide.o win-midi.o wx-main.o \
 	wx-config_sel.o wx-dialogbox.o wx-utils.o wx-app.o wx-sdl2-joystick.o wx-sdl2-mouse.o \
 	wx-sdl2-keyboard.o wx-sdl2-video.o wx-sdl2.o wx-config.o wx-deviceconfig.o wx-status.o \
 	wx-sdl2-status.o wx-resources.o wx-thread.o wx-common.o wx-sdl2-display-win.o \