Skip erb files, idirect prerequisites

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67056 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

tool/update-deps

@@ -337,6 +337,7 @@ def read_single_cc_deps(path_i, cwd)
     next if /\A\# \d+ "(.*)"/ !~ line
     dep = $1
     next if %r{\A<.*>\z} =~ dep # omit <command-line>, etc.
+    next if /\.erb\z/ =~ dep
     compiler_wd ||= dep
     files[dep] = true
   }