Reorganize sys/win32

core/sys/win32/winmm.odin

@@ -0,0 +1,10 @@
+// +build windows
+package win32
+
+foreign import "system:winmm.lib"
+
+
+@(default_calling_convention = "std")
+foreign winmm {
+	@(link_name="timeGetTime") time_get_time :: proc() -> u32 ---;
+}