Fix hash_map type parameter to add Alloc for other platforms.
Fix hash_map type parameter to add Alloc for other platforms.

Change-Id: Idc5fb65a2cc469d55aff6f2cde0b51b326be0963

Livefyre/protobuf,google/protobuf,Livefyre/protobuf,google/protobuf,google/protobuf,Livefyre/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,Livefyre/protobuf,google/protobuf,google/protobuf,Livefyre/protobuf