Add make dist entires for THRIFT-3402
diff --git a/lib/perl/Makefile.am b/lib/perl/Makefile.am
index 2fb8c5a..0d2c8d3 100644
--- a/lib/perl/Makefile.am
+++ b/lib/perl/Makefile.am
@@ -57,6 +57,8 @@
 	lib/Thrift/Socket.pm \
 	lib/Thrift/SSLSocket.pm \
 	lib/Thrift/SSLServerSocket.pm \
+	lib/Thrift/UnixServerSocket.pm \
+	lib/Thrift/UnixSocket.pm \
 	lib/Thrift/Transport.pm \
 	README.md