Merge pull request #235 from ocroquette/sigint

Include signal.h to define SIGINT

gdbserver/gdb-server.c

@@ -11,6 +11,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
+#include <signal.h>
 #include <unistd.h>
 #include <sys/types.h>
 #ifdef __MINGW32__