Add missing include, required on some platforms

mhagander · mhagander · commit ca7435033bee · 2014-02-12T20:05:09.000+01:00
Noted by the buildfarm and Andres Freund
diff --git a/src/bin/pg_basebackup/pg_basebackup.c b/src/bin/pg_basebackup/pg_basebackup.c
@@ -21,6 +21,7 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <sys/wait.h>
+#include <signal.h>
 #include <time.h>
 
 #ifdef HAVE_LIBZ
