Backport patch to use systemd-0.4.0 crate

Otherwise the `patch.crates-io` directive throws off `cargo vendor` and
`cargo build` then tries to fetch from `github.com/jlebon/rust-systemd`.

0001-rust-Drop-crates-io-patch-and-use-0.4.0.patch

@@ -0,0 +1,33 @@
+From a87486e18e900271a7bd44453ce7c33b33bb78d3 Mon Sep 17 00:00:00 2001
+From: Jonathan Lebon <jonathan@jlebon.com>
+Date: Thu, 25 Oct 2018 14:52:12 -0400
+Subject: [PATCH] rust: Drop crates-io patch and use 0.4.0
+
+The latest release of the crate includes the features and fixes we need.
+
+Closes: #1639
+Approved by: cgwalters
+---
+ rust/Cargo.toml | 6 +-----
+ 1 file changed, 1 insertion(+), 5 deletions(-)
+
+diff --git a/rust/Cargo.toml b/rust/Cargo.toml
+index 202d2287..62aa51a4 100644
+--- a/rust/Cargo.toml
++++ b/rust/Cargo.toml
+@@ -16,11 +16,7 @@ tempfile = "3.0.3"
+ openat = "0.1.15"
+ curl = "0.4.14"
+ c_utf8 = "0.1.0"
+-systemd = "0.3.0"
+-
+-# Until https://github.com/jmesmon/rust-systemd/pull/54 gets merged
+-[patch.crates-io]
+-systemd =  { git = "https://github.com/jlebon/rust-systemd", branch = "pr/add-monotonic" }
++systemd = "0.4.0"
+ 
+ [lib]
+ name = "rpmostree_rust"
+-- 
+2.17.1
+

rpm-ostree.spec

@@ -22,6 +22,8 @@ Source0: rpm-ostree-%{version}.tar.xz
 License: LGPLv2+
 URL: https://github.com/projectatomic/rpm-ostree
 
+Patch0: 0001-rust-Drop-crates-io-patch-and-use-0.4.0.patch
+
 %if %{with rust}
     %if !%{defined rust_arches}
         # It's not defined yet in the base CentOS7 root

sources

@@ -1 +1 @@
-SHA512 (rpm-ostree-2018.9.tar.xz) = 14b7d160d73268bd4427d62d1be1a16a8d721bde5edaceea672fbe2fd917617fbeab086325f62dff649c200906b4c4df7098c196039532d5624f14eb4c30c05f
+SHA512 (rpm-ostree-2018.9.tar.xz) = c83b3ef6d489168ef1ac6afb8718a26f1dce382df97558d47ef1cdaad0aa8b4006dc7c7509734673cff3d0d434ca93ad0d1c3979d15adb13997d458d385b79d3