debian/genprovides: don't generate ruby-rake

Author: terceiro

debian/genprovides

@@ -6,5 +6,5 @@ printf 'libruby:Provides='
 find "$@" -name \*.gemspec \
 	| xargs -n 1 basename \
 	| sort \
-	| grep -v bundler \
+	| grep -v 'bundler\|rake' \
 	| sed -e 's/_/-/g; s/\(.*\)-\([0-9.]\+\)\.gemspec/ruby-\1 (= \2), /' | xargs echo