LibC: Add definitions to LibC that are used by some ports

userspace/libraries/LibC/include/netdb.h

@@ -42,6 +42,11 @@ __BEGIN_DECLS
 #define EAI_SYSTEM		9
 #define EAI_OVERFLOW	10
 
+#define HOST_NOT_FOUND	1
+#define NO_DATA			2
+#define NO_RECOVERY		3
+#define TRY_AGAIN		4
+
 struct hostent
 {
 	char*	h_name;			/* Official name of the host. */

userspace/libraries/LibC/include/signal.h

@@ -108,6 +108,8 @@ struct sigevent
 #define SIGRTMIN  30
 #define SIGRTMAX  (SIGRTMIN+32)
 
+#define NSIG SIGRTMAX
+
 #define SI_USER    10
 #define SI_QUEUE   11
 #define SI_TIMER   12