Adapt to new packaging

Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>

errno-fix-metadata.diff

@@ -1,5 +1,5 @@
---- errno-0.2.4/Cargo.toml	1969-12-31T16:00:00-08:00
-+++ errno-0.2.4/Cargo.toml	2018-07-10T21:36:13.719848-07:00
+--- errno-0.2.4/Cargo.toml	1970-01-01T01:00:00+01:00
++++ errno-0.2.4/Cargo.toml	2018-11-02T18:45:02.098347+01:00
 @@ -19,13 +19,8 @@
  categories = ["os"]
  license = "MIT/Apache-2.0"

rust-errno.spec

@@ -6,34 +6,52 @@
 
 Name:           rust-%{crate}
 Version:        0.2.4
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        Cross-platform interface to the `errno` variable
 
+# Upstream license specification: MIT/Apache-2.0
 License:        MIT or ASL 2.0
 URL:            https://crates.io/crates/errno
 Source0:        https://crates.io/api/v1/crates/%{crate}/%{version}/download#/%{crate}-%{version}.crate
 # Initial patched metadata
 # * No windows or dragonfly
-Patch0:         errno-0.2.4-fix-metadata.diff
+Patch0:         errno-fix-metadata.diff
 
 ExclusiveArch:  %{rust_arches}
 
 BuildRequires:  rust-packaging
-# [dependencies]
-BuildRequires:  (crate(libc) >= 0.2.0 with crate(libc) < 0.3.0)
+BuildRequires:  (crate(libc/default) >= 0.2.0 with crate(libc/default) < 0.3.0)
 
-%description
-%{summary}.
+%global _description \
+Cross-platform interface to the `errno` variable.
+
+%description %{_description}
 
 %package        devel
 Summary:        %{summary}
 BuildArch:      noarch
 
-%description    devel
-Cross-platform interface to the `errno` variable.
+%description    devel %{_description}
 
 This package contains library source intended for building other packages
-which use %{crate} from crates.io.
+which use "%{crate}" crate.
+
+%files          devel
+%license LICENSE-MIT LICENSE-APACHE
+%doc README.md
+%{cargo_registry}/%{crate}-%{version}/
+
+%package     -n %{name}+default-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+default-devel %{_description}
+
+This package contains library source intended for building other packages
+which use "default" feature of "%{crate}" crate.
+
+%files       -n %{name}+default-devel
+%ghost %{cargo_registry}/%{crate}-%{version}/Cargo.toml
 
 %prep
 %autosetup -n %{crate}-%{version} -p1
@@ -50,13 +68,10 @@ which use %{crate} from crates.io.
 %cargo_test
 %endif
 
-%files          devel
-%license LICENSE-MIT LICENSE-APACHE
-%doc README.md
-%{cargo_registry}/%{crate}-%{version}/
-%exclude %{cargo_registry}/%{crate}-%{version}/appveyor.yml
-
 %changelog
+* Fri Nov 02 2018 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 0.2.4-3
+- Adapt to new packaging
+
 * Sat Jul 14 2018 Fedora Release Engineering <releng@fedoraproject.org> - 0.2.4-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild