dev-rust: add unix_socket crate

We need this crate for memd.

BUG=chromium:926668
TEST=emerge-caroline dev-rust/unix_socket

Change-Id: Ifae92e5ac36a0382a513c23330585565f01bc9bb
Reviewed-on: https://chromium-review.googlesource.com/1484184
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Sonny Rao <sonnyrao@chromium.org>
Reviewed-by: Sonny Rao <sonnyrao@chromium.org>
diff --git a/dev-rust/unix_socket/unix_socket-0.5.0.ebuild b/dev-rust/unix_socket/unix_socket-0.5.0.ebuild
new file mode 100644
index 0000000..07e6ddf
--- /dev/null
+++ b/dev-rust/unix_socket/unix_socket-0.5.0.ebuild
@@ -0,0 +1,19 @@
+# Copyright 2019 The Chromium OS Authors. All rights reserved.
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI="6"
+
+inherit cros-rust
+
+DESCRIPTION="Support for Unix domain socket clients and servers."
+HOMEPAGE="https://github.com/rust-lang-nursery/unix-socket"
+SRC_URI="https://crates.io/api/v1/crates/${PN}/${PV}/download -> ${P}.crate"
+
+LICENSE="|| ( MIT Apache-2.0 )"
+SLOT="${PV}/${PR}"
+KEYWORDS="*"
+
+DEPEND=">=dev-rust/cfg-if-0.1.0:=
+	>=dev-rust/libc-0.2.1:=
+	>=dev-rust/tempdir-0.3.0:=
+"