Red Bear OS relibc baseline

From release 0.1.0 pre-patched archive.
This includes all Red Bear modifications previously maintained
as patches in local/patches/relibc/.

tests/string/strcat.c

@@ -0,0 +1,12 @@
+#include <string.h>
+#include <stdio.h>
+
+#include "test_helpers.h"
+
+int main(void) {
+    char dest1[12] = "hello";
+	  printf("%s\n", strcat(dest1, " world")); // should be hello world
+
+    char dest2[12] = "hello";
+  	printf("%s\n", strncat(dest2, " world foobar", 6)); // should be hello world
+}