Make bottle path.

Library/Homebrew/download_strategy.rb

@@ -164,7 +164,8 @@ end
 class CurlBottleDownloadStrategy <CurlDownloadStrategy
   def initialize url, name, version, specs
     super
-    @tarball_path=HOMEBREW_CACHE+'Bottles'+("#{name}-#{version}"+ext)
+    HOMEBREW_CACHE_BOTTLES.mkpath
+    @tarball_path=HOMEBREW_CACHE_BOTTLES+("#{name}-#{version}"+ext)
   end
   def stage
     ohai "Pouring #{File.basename(@tarball_path)}"

Library/Homebrew/global.rb

@@ -23,6 +23,9 @@ end
 # Where brews installed via URL are cached
 HOMEBREW_CACHE_FORMULA = HOMEBREW_CACHE+"Formula"
 
+# Where bottles are cached
+HOMEBREW_CACHE_BOTTLES = HOMEBREW_CACHE+"Bottles"
+
 if not defined? HOMEBREW_BREW_FILE
   HOMEBREW_BREW_FILE = ENV['HOMEBREW_BREW_FILE'] || `which brew`.chomp
 end