added missing header files to makefile

include/libtorrent/Makefile.am

@@ -64,6 +64,7 @@ nobase_include_HEADERS = \
   magnet_uri.hpp               \
   max.hpp                      \
   natpmp.hpp                   \
+  packet_buffer.hpp            \
   parse_url.hpp                \
   pch.hpp                      \
   pe_crypto.hpp                \
@@ -110,6 +111,7 @@ nobase_include_HEADERS = \
   utp_stream.hpp               \
   utf8.hpp                     \
   version.hpp                  \
+  web_connection_base.hpp      \
   web_peer_connection.hpp      \
   xml_parse.hpp                \
   \