Merge pull request #2718 from uberhacker/update-llvm-package

Make graphviz and sphinx build dependencies

packages/llvm.rb

@@ -21,10 +21,10 @@ class Llvm < Package
   })
 
   depends_on 'python27' => :build # for test suite
-  depends_on 'graphviz'
+  depends_on 'graphviz' => :build
+  depends_on 'sphinx' => :build
   depends_on 'libedit'
   depends_on 'libtirpc'
-  depends_on 'sphinx'
   depends_on 'swig'
 
   def self.preinstall