Added forgotten file

new file:   src/capability.c

conts/posix/test0/src/capability.c

@@ -0,0 +1,24 @@
+#include <capability.h>
+#include <l4lib/arch/syslib.h>
+#include <l4lib/ipcdefs.h>
+
+int cap_request_pager(struct capability *cap)
+{
+	int err;
+
+	write_mr(L4SYS_ARG0, (u32)cap);
+
+	if ((err = l4_sendrecv(pagerid, pagerid,
+			       L4_REQUEST_CAPABILITY)) < 0) {
+		printf("%s: L4 IPC Error: %d.\n", __FUNCTION__, err);
+		return err;
+	}
+
+	/* Check if syscall itself was successful */
+	if ((err = l4_get_retval()) < 0) {
+		printf("%s: Error: %d\n", __FUNCTION__, err);
+		return err;
+	}
+	return err;
+}
+