Fix backend project_info issues

src/python/pants/build_graph/intermediate_target_factory.py

@@ -7,7 +7,7 @@
 from builtins import str
 from hashlib import sha1
 
-from future.utils import string_types
+from future.utils import PY3, string_types
 
 from pants.base.exceptions import TargetDefinitionException
 from pants.build_graph.address import Address
@@ -16,9 +16,9 @@
 
 def hash_target(address, suffix):
   hasher = sha1()
-  hasher.update(address)
-  hasher.update(suffix)
-  return hasher.hexdigest()
+  hasher.update(address.encode('utf-8'))
+  hasher.update(suffix.encode('utf-8'))
+  return hasher.hexdigest() if PY3 else hasher.hexdigest().decode('utf-8')
 
 
 class IntermediateTargetFactoryBase(AbstractClass):