overlay coreos-devel/sdk-depends: Add app-text/mandoc

It's a build dependency of sys-libs/efivars.

Author: krnowak

sdk_container/src/third_party/coreos-overlay/coreos-devel/sdk-depends/sdk-depends-0.0.1-r47.ebuild renamed to sdk_container/src/third_party/coreos-overlay/coreos-devel/sdk-depends/sdk-depends-0.0.1-r48.ebuild

@@ -25,6 +25,7 @@ DEPEND="
 	app-eselect/eselect-python
 	app-misc/jq
 	app-shells/bash-completion
+	app-text/mandoc
 	coreos-base/hard-host-depends
 	coreos-base/coreos-sb-keys
 	coreos-devel/fero-client