[BUILD] add signal.o to all makefiles
diff --git a/Makefile b/Makefile
index b8655fb..8e97645 100644
--- a/Makefile
+++ b/Makefile
@@ -458,7 +458,7 @@
        src/checks.o src/queue.o src/client.o src/proxy.o src/proto_uxst.o \
        src/proto_http.o src/stream_sock.o src/appsession.o src/backend.o \
        src/stream_interface.o src/dumpstats.o src/proto_tcp.o \
-       src/session.o src/hdr_idx.o src/ev_select.o \
+       src/session.o src/hdr_idx.o src/ev_select.o src/signal.o \
        src/acl.o src/memory.o src/freq_ctr.o \
        src/ebtree.o src/eb32tree.o