oatbar: link to upstream bug report

Author: 0-wiz-0

oatbar/TODO

@@ -3,3 +3,7 @@ error: Support for this target OS is not implemented yet!
   --> /tmp/wm/oatbar/work/vendor/battery-0.7.8/src/platform/mod.rs:27:9
 
 https://github.com/svartalf/rust-battery/issues/20
+
+and
+
+https://github.com/igor-petruk/oatbar/issues/38