Add mesalink feature to keep compatibility

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

curl-sys-fix-metadata.diff

@@ -1,5 +1,5 @@
 --- curl-sys-0.4.31+curl-7.70.0/Cargo.toml	2020-04-29T16:02:44+00:00
-+++ curl-sys-0.4.31+curl-7.70.0/Cargo.toml	2020-05-17T14:07:18.084789+00:00
++++ curl-sys-0.4.31+curl-7.70.0/Cargo.toml	2020-05-17T14:14:14.026899+00:00
 @@ -12,7 +12,7 @@
  
  [package]
@@ -28,12 +28,13 @@
  [build-dependencies.cc]
  version = "1.0"
  
-@@ -49,20 +37,12 @@
+@@ -49,20 +37,13 @@
  [features]
  default = ["ssl"]
  force-system-lib-on-osx = []
 -http2 = ["libnghttp2-sys"]
 +http2 = []
++mesalink = []
  protocol-ftp = []
  spnego = []
 -ssl = ["openssl-sys"]

rust-curl-sys.spec

@@ -84,6 +84,18 @@ which use "http2" feature of "%{crate}" crate.
 %files       -n %{name}+http2-devel
 %ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
 
+%package     -n %{name}+mesalink-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+mesalink-devel %{_description}
+
+This package contains library source intended for building other packages
+which use "mesalink" feature of "%{crate}" crate.
+
+%files       -n %{name}+mesalink-devel
+%ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
+
 %package     -n %{name}+protocol-ftp-devel
 Summary:        %{summary}
 BuildArch:      noarch