Update dep on mochiweb to include http error packets fix from @seancribbs

Fixes: bz1291

Author: jaredmorrow

rebar.config

@@ -5,5 +5,5 @@
 
 {deps, [
         {mochiweb, "1.5.1", {git, "git://github.com/basho/mochiweb",
-                            {tag, "1.5.1-http-headers-fix"}}}
+                            {tag, "1.5.1-riak-1.0.x-fixes"}}}
         ]}.