Update Leopard/Tiger bottle tags

* PPC bottles are in the os_cpu format, e.g. :tiger_g3
* Intel bottles are the bare cat, as usual
* 64-bit bottles have _64 appended to them, e.g. :tiger_g5_64 or :leopard_64

Library/Homebrew/bottles.rb

@@ -81,7 +81,13 @@ def bottle_tag
   when "10.6"
     Hardware::CPU.is_64_bit? ? :snow_leopard : :snow_leopard_32
   else
-    Hardware::CPU.type == :ppc ? Hardware::CPU.family : MacOS.cat
+    # Return, e.g., :tiger_g3, :leopard_g5_64, :leopard_64 (which is Intel)
+    if Hardware::CPU.type == :ppc
+      tag = "#{MacOS.cat}_#{Hardware::CPU.family}".to_sym
+    else
+      tag = MacOS.cat
+    end
+    MacOS.prefer_64_bit? ? "#{tag}_64".to_sym : tag
   end
 end