Download the Windows compiler

We use this for building code to run on the driver's station.

Change-Id: I03cb907f67419e45a3a7204fa61ba2dd73b6687c
diff --git a/debian/mingw_compiler.BUILD b/debian/mingw_compiler.BUILD
new file mode 100644
index 0000000..7f3f87c
--- /dev/null
+++ b/debian/mingw_compiler.BUILD
@@ -0,0 +1,5 @@
+filegroup(
+    name = "all_files",
+    srcs = glob(["**"]),
+    visibility = ["//visibility:public"],
+)