Buildify various files

Automated tools keep doing these by accident.  Lets just do them and get
it over with.

Change-Id: If1fef9b4cf5ca58f8a14674124cdef3118562edf
diff --git a/y2020/vision/sift/BUILD b/y2020/vision/sift/BUILD
index 4a0dcfb..98c6ec6 100644
--- a/y2020/vision/sift/BUILD
+++ b/y2020/vision/sift/BUILD
@@ -24,13 +24,13 @@
         ":fast_gaussian_generator",
         "@amd64_debian_sysroot//:sysroot_files",
     ],
-    toolchains = [
-        "@bazel_tools//tools/cpp:current_cc_toolchain",
-    ],
     main = "fast_gaussian_runner.py",
     python_version = "PY3",
     srcs_version = "PY2AND3",
     target_compatible_with = ["@platforms//os:linux"],
+    toolchains = [
+        "@bazel_tools//tools/cpp:current_cc_toolchain",
+    ],
     deps = [
         "@bazel_tools//tools/python/runfiles",
     ],