src: use signal infrastructure that will be available in libosmocore
This is still not in mainline yet, it's in a separate patch that
I expect to send to Harald soon.
diff --git a/src/input/dahdi.c b/src/input/dahdi.c
index 5a452a4..3d33749 100644
--- a/src/input/dahdi.c
+++ b/src/input/dahdi.c
@@ -37,9 +37,9 @@
#include <osmocom/core/select.h>
#include <osmocom/core/msgb.h>
#include <osmocom/core/logging.h>
+#include <osmocom/core/signal.h>
#include <osmocom/abis/subchan_demux.h>
#include <osmocom/abis/e1_input.h>
-#include <osmocom/abis/signal.h>
#include <talloc.h>
#include <osmocom/abis/lapd.h>