Missing include.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22053 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/tests/system/kernel/sigint_bug113_test.cpp

@@ -1,6 +1,7 @@
 #include <inttypes.h>
 #include <signal.h>
 #include <stdio.h>
+#include <string.h>
 #include <unistd.h>
 
 #define ADD_SIGNAL(signal)	{ signal, #signal }