No licenses, link to bug report added

Signed-off-by: Robert-André Mauchin <zebob.m@gmail.com>

rust-futures-task.spec

@@ -11,6 +11,7 @@ Release:        1%{?dist}
 Summary:        Tools for working with tasks
 
 # Upstream license specification: MIT OR Apache-2.0
+# https://github.com/rust-lang/futures-rs/issues/2005
 License:        MIT or ASL 2.0
 URL:            https://crates.io/crates/futures-task
 Source:         %{crates_source}
@@ -37,7 +38,6 @@ This package contains library source intended for building other packages
 which use "%{crate}" crate.
 
 %files          devel
-%license LICENSE-APACHE LICENSE-MIT
 %{cargo_registry}/%{crate}-%{version}/
 
 %package     -n %{name}+default-devel