added sources

lib/string_polyfill/stringp.h

@@ -0,0 +1,17 @@
+#pragma once
+#include <string.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+  // NOTE The following functions are not available in the OFW, so we need to reimplement them as a polyfill.
+
+  char *strcat_(char *dest, const char *src);
+  char *rawmemchr_(char *s, char c);
+  char *strpbrk_(char *s1, const char *s2);
+  char *strtok_(char *s, const char *delim);
+
+#ifdef __cplusplus
+}
+#endif