Upgrade autocxx

This gets rid of most of our local changes.

Change-Id: I8a0aa1149e6e4c0c5c21952afd39915ec2a8bbfa
Signed-off-by: Brian Silverman <bsilver16384@gmail.com>
diff --git a/third_party/cargo/remote/BUILD.proc-macro-error-attr-1.0.4.bazel b/third_party/cargo/remote/BUILD.proc-macro-error-attr-1.0.4.bazel
index b737055..fdca1a4 100644
--- a/third_party/cargo/remote/BUILD.proc-macro-error-attr-1.0.4.bazel
+++ b/third_party/cargo/remote/BUILD.proc-macro-error-attr-1.0.4.bazel
@@ -81,7 +81,7 @@
     # buildifier: leave-alone
     deps = [
         ":proc_macro_error_attr_build_script",
-        "@raze__proc_macro2__1_0_39//:proc_macro2",
-        "@raze__quote__1_0_18//:quote",
+        "@raze__proc_macro2__1_0_40//:proc_macro2",
+        "@raze__quote__1_0_20//:quote",
     ],
 )