Fixing rake redis:install to work with new redis dir structure

Earlier today the directory structure of redis was changed so src
files were moved into the src/ directory, along with the makefile.
This version of the patch continues using the master branch, which
is unstable. I'm creating another patch to use the 2.0.0 branch.

Author: chewbranca

tasks/redis.rake

@@ -93,7 +93,7 @@ namespace :redis do
     end
 
     %w(redis-benchmark redis-cli redis-server).each do |bin|
-      sh "cp /tmp/redis/#{bin} #{bin_dir}"
+      sh "cp /tmp/redis/src//#{bin} #{bin_dir}"
     end
 
     puts "Installed redis-benchmark, redis-cli and redis-server to #{bin_dir}"
@@ -105,8 +105,8 @@ namespace :redis do
   end
 
   task :make do
-    sh "cd /tmp/redis && make clean"
-    sh "cd /tmp/redis && make"
+    sh "cd /tmp/redis/src && make clean"
+    sh "cd /tmp/redis/src && make"
   end
 
   desc "Download package"