formulary: remap deprecated options from keg.

When reading a building a formula from a keg (rather than e.g. from
name) then the deprecation options were not remapped correctly as they
are only done in `Tab.for_formula` and not `Tab.for_keg`. Ensure that
after we’ve created the formula that the `used_options` are remapped
correctly.

Library/Homebrew/formula_installer.rb

@@ -467,7 +467,6 @@ class FormulaInstaller
 
     fi = DependencyInstaller.new(df)
     fi.options           |= tab.used_options
-    fi.options           |= Tab.remap_deprecated_options(df.deprecated_options, dep.options)
     fi.options           |= inherited_options
     fi.options           &= df.options
     fi.build_from_source  = ARGV.build_formula_from_source?(df)

Library/Homebrew/formulary.rb

@@ -276,6 +276,7 @@ class Formulary
       end
     end
     f.build = tab
+    f.build.used_options = Tab.remap_deprecated_options(f.deprecated_options, tab.used_options).as_flags
     f.version.update_commit(keg.version.version.commit) if f.head? && keg.version.head?
     f
   end