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/strcpy.c

@@ -0,0 +1,29 @@
+#include <stdio.h>
+#include <string.h>
+
+#include "test_helpers.h"
+
+int main(void) {
+    char dst[20];
+
+    strcpy(dst, "strcpy works!");
+    puts(dst);
+    strncpy(dst, "strncpy works!", 20);
+    puts(dst);
+
+    // Make sure no NUL is placed
+    memset(dst, 'a', 20);
+    dst[19] = 0;
+    strncpy(dst, "strncpy should work here too", 10);
+    puts(dst);
+
+    // The string should be properly terminated regardless
+    char ndst[28];
+
+    size_t r = strlcpy(ndst, "strlcpy works!", 28);
+    puts(ndst);
+    printf("copied %lu\n", r);
+    r = strlcat(ndst, " and strlcat!", 28);
+    puts(ndst);
+    printf("copied %lu\n", r);
+}