Adapt to new packaging

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

rust-rustc-demangle.spec

@@ -6,9 +6,10 @@
 
 Name:           rust-%{crate}
 Version:        0.1.9
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        Rust compiler symbol demangling
 
+# Upstream license specification: MIT/Apache-2.0
 License:        MIT or ASL 2.0
 URL:            https://crates.io/crates/rustc-demangle
 Source0:        https://crates.io/api/v1/crates/%{crate}/%{version}/download#/%{crate}-%{version}.crate
@@ -17,18 +18,36 @@ ExclusiveArch:  %{rust_arches}
 
 BuildRequires:  rust-packaging
 
-%description
-%{summary}.
+%global _description \
+Rust compiler symbol demangling.
+
+%description %{_description}
 
 %package        devel
 Summary:        %{summary}
 BuildArch:      noarch
 
-%description    devel
-Rust compiler symbol demangling.
+%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
@@ -45,13 +64,10 @@ which use %{crate} from crates.io.
 %cargo_test
 %endif
 
-%files          devel
-%license LICENSE-MIT LICENSE-APACHE
-%doc README.md
-%{cargo_registry}/%{crate}-%{version}/
-%exclude %{_bindir}/rustc-demangle
-
 %changelog
+* Fri Nov 02 2018 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 0.1.9-2
+- Adapt to new packaging
+
 * Thu Jul 19 2018 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 0.1.9-1
 - Update to 0.1.9