Fix ruby-ldap-0.9.20 gem building

It needs a patched gem that we're providing in order to build successfully.

dist/obs-bundled-gems.spec

@@ -28,6 +28,8 @@ Name:           obs-bundled-gems
 Version:        2.10~pre
 Release:        0
 Summary:        The Open Build Service -- Bundled Gems
+# patched gem with the fies from devel:languages:ruby:extensions
+Source0:        ruby-ldap-0.9.20.gem
 # The actual license is from the gems, but we take a more restrictive
 # license to bundle them. Most are MIT anyway (TODO for Ana: check)
 License:        GPL-2.0-only OR GPL-3.0-only
@@ -127,6 +129,7 @@ bundle config build.sassc --disable-march-tune-native
 bundle config build.nio4r --with-cflags='%{optflags} -Wno-return-type'
 bundle config force_ruby_platform true
 bundle config set --local path %{buildroot}%_libdir/obs-api/
+cp %{S:0} %{_sourcedir}/open-build-service-*/src/api/vendor/cache
 
 bundle install --local
 popd